Linedef type

A linedef can create special effects by having a type. Over a hundred linedef types are available for use between Doom and Doom II. Heretic, Strife, and Doom 64 include additional linedef types. Hexen generalizes them into action specials, usable not just on linedefs but also on things and in ACS scripts.

Various source ports also add additional linedef types. Boom in particular includes both the Doom linedef types (known here as "regular") and a selection of "extended" and "generalized" linedef types now supported by many modern source ports (see Category:Boom compatible).

Additional information on linedef types can be found in the Unofficial Doom Specs. There is also Python code for generating and decoding types.

What follows is a complete table of linedef types throughout the Doom engine games and various source ports, followed by extensive detail on the functionality of linedef types. The latter is based on the document boomref.txt from the Boom source code distribution.

Table of all types

Type	Origin	Description
1	Doom	DR Door
1	Heretic	DR Door
1	Strife	DR Door
2	Doom	W1 Door Stay Open
2	Heretic	W1 Door Stay Open
2	Strife	W1 Door Stay Open
3	Doom	W1 Door Close
3	Heretic	W1 Door Close
3	Strife	W1 Door Close
4	Doom	W1 Door
4	Heretic	W1 Door
4	Strife	W1 Door Also Monsters
5	Doom	W1 Floor To Lowest Adjacent Ceiling
5	Heretic	W1 Floor To Lowest Adjacent Ceiling
5	Strife	W1 Floor To Lowest Adjacent Ceil
6	Doom	W1 Start Crusher, Fast Damage
6	Heretic	W1 Start Crusher, Fast Damage
6	Strife	W1 Start Crusher, Very Fast Damage
7	Doom	S1 Build Stairs 8 Up
7	Heretic	S1 Build Stairs 8 Up
7	Strife	S1 Build Stairs 8 Up
8	Doom	W1 Build Stairs 8 Up
8	Heretic	W1 Build Stairs 8 Up
8	Strife	W1 Build Stairs 8 Up
9	Doom	S1 Floor Donut
9	Heretic	S1 Floor Donut
9	Strife	S1 Floor Donut
10	Doom	W1 Lift Also Monsters
10	Heretic	W1 Lift
10	Strife	W1 Lift Also Monsters
11	Doom	S1 Exit (Normal)
11	Heretic	S1 Exit (Normal)
11	Strife	SR Exit To Map #Tag (0 = Next)
12	Doom	W1 Light To Highest Adjacent Level
12	Heretic	W1 Light To Highest Adjacent Level
12	Strife	W1 Light To Highest Adjacent Level
13	Doom	W1 Light To 255
13	Heretic	W1 Light To 255
13	Strife	W1 Light To 255
14	Doom	S1 Floor Up 32 Change Texture
14	Heretic	S1 Floor Up 32 Change Texture
14	Strife	S1 Floor Up 32 Change Texture
15	Doom	S1 Floor Up 24 Change Texture
15	Heretic	S1 Floor Up 24 Change Texture
15	Strife	S1 Floor Up 24 Change Texture
16	Doom	W1 Door Close and Open
16	Heretic	W1 Door Close and Open
16	Strife	W1 Door Close and Open
17	Doom	W1 Light Blink 1.0 Sec
17	Heretic	W1 Light Blink 1.0 Sec
17	Strife	W1 Light Blink 1.0 Sec
18	Doom	S1 Floor To Higher Adjacent Floor
18	Heretic	S1 Floor To Higher Adjacent Floor
18	Strife	S1 Floor To Higher Adjacent Floor
19	Doom	W1 Floor To Highest Adjacent Floor
19	Heretic	W1 Floor To Highest Adjacent Floor
19	Strife	W1 Floor To Highest Adjacent Floor
20	Doom	S1 Floor To Higher Floor Change Texture
20	Heretic	S1 Floor To Higher Floor Change Texture
20	Strife	S1 Floor To Higher Floor Change Texture
21	Doom	S1 Lift
21	Heretic	S1 Lift
21	Strife	S1 Lift
22	Doom	W1 Floor To Higher Floor Change Texture
22	Heretic	W1 Floor To Higher Floor Change Texture
22	Strife	W1 Floor To Higher Floor Change Texture
23	Doom	S1 Floor To Lowest Adjacent Floor
23	Heretic	S1 Floor To Lowest Adjacent Floor
23	Strife	S1 Floor To Lowest Adjacent Floor
24	Doom	G1 Floor To Lowest Adjacent Ceiling
24	Heretic	G1 Floor To Lowest Adjacent Ceiling
24	Strife	G1 Floor To Lowest Adjacent Ceiling
25	Doom	W1 Start Crusher, Slow Damage
25	Heretic	W1 Start Crusher, Slow Damage
25	Strife	W1 Start Crusher, Slow No Damage
26	Doom	DR Door Blue Key
26	Heretic	DR Door Blue Key
26	Strife	DR Door ID Badge
27	Doom	DR Door Yellow Key
27	Heretic	DR Door Yellow Key
27	Strife	DR Door Passcard
28	Doom	DR Door Red Key
28	Heretic	DR Door Green Key
28	Strife	DR Door ID Card
29	Doom	S1 Door
29	Heretic	S1 Door
29	Strife	S1 Door
30	Doom	W1 Floor Up Shortest Lower Texture
30	Heretic	W1 Floor Up Shortest Lower Texture
30	Strife	W1 Floor Up Shortest Lower Texture
31	Doom	D1 Door Stay Open
31	Heretic	D1 Door Stay Open
31	Strife	D1 Door Stay Open
32	Doom	D1 Door Blue Key
32	Heretic	D1 Door Blue Key
32	Strife	D1 Door Stay Open ID Badge
33	Doom	D1 Door Red Key
33	Heretic	D1 Door Green Key
33	Strife	D1 Door Stay Open ID Card
34	Doom	D1 Door Yellow Key
34	Heretic	D1 Door Yellow Key
34	Strife	D1 Door Stay Open Passcard
35	Doom	W1 Light To 35
35	Heretic	W1 Light To 35
35	Strife	W1 Light To 35
36	Doom	W1 Floor To 8 Above Highest Adjacent Floor Fast
36	Heretic	W1 Floor To 8 Above Higher Adjacent Floor Fast
36	Strife	W1 Floor To Highest Adjacent Floor Fast
37	Doom	W1 Floor To Lowest Adjacent Floor Change Texture and Type
37	Heretic	W1 Floor To Lowest Adjacent Floor Change Texture and Type
37	Strife	W1 Floor To LAF Change Texture and Type
38	Doom	W1 Floor To Lowest Adjacent Floor
38	Heretic	W1 Floor To Lowest Adjacent Floor
38	Strife	W1 Floor To Lowest Adjacent Floor
39	Doom	W1 Teleport
39	Heretic	W1 Teleport
39	Strife	W1 Teleport
40	Doom	W1 Ceiling To Highest Ceiling
40	Heretic	W1 Ceiling To Highest Ceiling
40	Strife	S1 Door Split Open To Lowest
41	Doom	S1 Ceiling To Floor
41	Heretic	S1 Ceiling To Floor
41	Strife	S1 Ceiling To Floor
42	Doom	SR Door Close
42	Heretic	SR Door Close
42	Strife	SR Door Close
43	Doom	SR Ceiling To Floor
43	Heretic	SR Ceiling To Floor
43	Strife	SR Ceiling To Floor
44	Doom	W1 Ceiling To 8 Above Floor
44	Heretic	W1 Ceiling To 8 Above Floor
44	Strife	W1 Crusher To Floor And Stops
45	Doom	SR Floor To Highest Adjacent Floor
45	Heretic	SR Floor To Highest Adjacent Floor
45	Strife	SR Floor To Highest Adjacent Floor
46	Doom	GR Door Also Monsters
46	Heretic	GR Door Also Monsters
46	Strife	GR Door
47	Doom	G1 Floor To Higher Floor Change Texture
47	Heretic	G1 Floor To Higher Floor Change Texture
47	Strife	G1 Floor To Higher Floor Change Texture
48	Doom	Scrolling Wall Left
48	Heretic	Scrolling Wall Left
48	Strife	Scrolling Wall Left
49	Doom	S1 Start Crusher, Slow Damage
49	Heretic	S1 Ceiling To 8 Above Floor
49	Strife	S1 Ceiling To 8 Above Floor Continually
50	Doom	S1 Door Close
50	Heretic	S1 Door Close
50	Strife	S1 Door Close
51	Doom	S1 Exit (Secret)
51	Heretic	S1 Exit (Secret)
51	Strife	S1 Exit (Endgame)
52	Doom	W1 Exit (Normal)
52	Heretic	W1 Exit (Normal)
52	Strife	W1 Exit to Map #Tag/100
53	Doom	W1 Start Moving Floor
53	Heretic	W1 Start Moving Floor
53	Strife	W1 Start Moving Floor
54	Doom	W1 Stop Moving Floor
54	Heretic	W1 Stop Moving Floor
54	Strife	W1 Stop Moving Floor
55	Doom	S1 Floor To 8 Below Lowest Adjacent Ceiling and Crush
55	Heretic	S1 Floor To 8 Below Lowest Adjacent Ceiling and Crush
55	Strife	S1 Floor To 8 Below LAC and Crush
56	Doom	W1 Floor To 8 Below Lowest Adjacent Ceiling and Crush
56	Heretic	W1 Floor To 8 Below Lowest Adjacent Ceiling and Crush
56	Strife	W1 Floor To 8 Below LAC and Crush
57	Doom	W1 Stop Crusher
57	Heretic	W1 Stop Crusher
57	Strife	W1 Stop Crusher
58	Doom	W1 Floor Up 24
58	Heretic	W1 Floor Up 24
58	Strife	W1 Floor Up 64
59	Doom	W1 Floor Up 24 Change Texture and Type
59	Heretic	W1 Floor Up 24 Change Texture and Type
59	Strife	W1 Floor Up 24 Change Texture and Type
60	Doom	SR Floor To Lowest Adjacent Floor
60	Heretic	SR Floor To Lowest Adjacent Floor
60	Strife	SR Floor To Lowest Adjacent Floor
61	Doom	SR Door Stay Open
61	Heretic	SR Door Stay Open
61	Strife	SR Door Stay Open
62	Doom	SR Lift
62	Heretic	SR Lift
62	Strife	SR Lift
63	Doom	SR Door
63	Heretic	SR Door
63	Strife	SR Door
64	Doom	SR Floor To Lowest Adjacent Ceiling
64	Heretic	SR Floor To Lowest Adjacent Ceiling
64	Strife	SR Floor To Lowest Adjacent Ceiling
65	Doom	SR Floor To 8 Below Lowest Adjacent Ceiling and Crush
65	Heretic	SR Floor To 8 Below Lowest Adjacent Ceiling and Crush
65	Strife	SR Floor To 8 Below Lowest Adjacent Ceiling and Crush
66	Doom	SR Floor Up 24 Change Texture
66	Heretic	SR Floor Up 24 Change Texture
66	Strife	SR Floor Up 24 Change Texture
67	Doom	SR Floor Up 32 Change Texture
67	Heretic	SR Floor Up 32 Change Texture
67	Strife	SR Floor Up 32 Change Texture
68	Doom	SR Floor To Higher Floor Change Texture
68	Heretic	SR Floor To Higher Floor Change Texture
68	Strife	SR Floor To Higher Floor Change Texture
69	Doom	SR Floor To Higher Adjacent Floor
69	Heretic	SR Floor To Higher Adjacent Floor
69	Strife	SR Floor To Higher Adjacent Floor
70	Doom	SR Floor To 8 Above Higher Adjacent Floor Fast
70	Heretic	SR Floor To 8 Above Highest Adjacent Floor Fast
70	Strife	SR Floor To Highest Adjacent Floor Fast
71	Doom	S1 Floor To 8 Above Higher Adjacent Floor Fast
71	Heretic	S1 Floor To 8 Above Highest Adjacent Floor Fast
71	Strife	S1 Floor To Highest Adjacent Floor Fast
72	Doom	WR Ceiling To 8 Above Floor
72	Heretic	WR Ceiling To 8 Above Floor
72	Strife	WR Crusher To Floor And Stops
73	Doom	WR Start Crusher, Slow Damage
73	Heretic	WR Start Crusher, Slow Damage
73	Strife	WR Start Crusher, Slow Damage
74	Doom	WR Stop Crusher
74	Heretic	WR Stop Crusher
74	Strife	WR Stop Crusher
75	Doom	WR Door Close
75	Heretic	WR Door Close
75	Strife	WR Door Close
76	Doom	WR Door Close and Open
76	Heretic	WR Door Close and Open
76	Strife	WR Door Close and Open
77	Doom	WR Start Crusher, Fast Damage
77	Heretic	WR Start Crusher, Fast Damage
77	Strife	WR Start Crusher, Very Fast Damage
78	Boom	SR Change Floor Texture and Type (Numeric Model)
79	Doom	WR Light To 35
79	Heretic	WR Light To 35
79	Strife	WR Light To 35
80	Doom	WR Light To Highest Adjacent Level
80	Heretic	WR Light To Highest Adjacent Level
80	Strife	WR Light To Highest Adjacent Level
81	Doom	WR Light To 255
81	Heretic	WR Light To 255
81	Strife	WR Light To 255
82	Doom	WR Floor To Lowest Adjacent Floor
82	Heretic	WR Floor To Lowest Adjacent Floor
82	Strife	WR Floor To Lowest Adjacent Floor
83	Doom	WR Floor To Highest Adjacent Floor
83	Heretic	WR Floor To Highest Adjacent Floor
83	Strife	WR Floor To Highest Adjacent Floor
84	Doom	WR Floor To Lowest Adjacent Floor Change Texture and Type
84	Heretic	WR Floor To Lowest Adjacent Floor Change Texture and Type
84	Strife	WR Floor To Lowest Adjacent Floor Change Texture and Type
85	Boom	-- Scrolling Wall (Right)
86	Doom	WR Door Stay Open
86	Heretic	WR Door Stay Open
86	Strife	WR Door Stay Open
87	Doom	WR Start Moving Floor
87	Heretic	WR Start Moving Floor
87	Strife	WR Start Moving Floor
88	Doom	WR Lift Also Monsters
88	Heretic	WR Lift
88	Strife	WR Lift Also Monsters
89	Doom	WR Stop Moving Floor
89	Heretic	WR Stop Moving Floor
89	Strife	WR Stop Moving Floor
90	Doom	WR Door
90	Heretic	WR Door
90	Strife	WR Door
91	Doom	WR Floor To Lowest Adjacent Ceiling
91	Heretic	WR Floor To Lowest Adjacent Ceiling
91	Strife	WR Floor To Lowest Adjacent Ceiling
92	Doom	WR Floor Up 24
92	Heretic	WR Floor Up 24
92	Strife	WR Floor Up 64
93	Doom	WR Floor Up 24 Change Texture and Type
93	Heretic	WR Floor Up 24 Change Texture and Type
93	Strife	WR Floor Up 24 Change Texture and Type
94	Doom	WR Floor To 8 Below Lowest Adjacent Ceiling and Crush
94	Heretic	WR Floor To 8 Below Lowest Adjacent Ceiling and Crush
94	Strife	WR Floor To 8 Below Lowest Adjacent Ceiling and Crush
95	Doom	WR Floor To Higher Floor Change Texture
95	Heretic	WR Floor To Higher Floor Change Texture
95	Strife	WR Floor To Higher Floor Change Texture
96	Doom	WR Floor Up Shortest Lower Texture
96	Heretic	WR Floor Up Shortest Lo Texture
96	Strife	WR Floor Up Shortest Lower Texture
97	Doom	WR Teleport
97	Heretic	WR Teleport
97	Strife	WR Teleport
98	Doom	WR Floor To 8 Above Highest Adjacent Floor Fast
98	Heretic	WR Floor To 8 Above Highest Adjacent Floor Fast
98	Strife	WR Floor To Highest Adjacent Floor Fast
99	Doom II	SR Door Blue Key Fast
99	Heretic	Scrolling Wall Right
99	Strife	SR Door Fast ID Badge
100	Doom II	W1 Build Stairs 16 and Crush
100	Heretic	WR Door Triple Speed
100	Strife	W1 Build Stairs 16 Crush
101	Doom	S1 Floor To Lowest Adjacent Ceiling
101	Heretic	S1 Floor To Lowest Adjacent Ceiling
101	Strife	S1 Floor To Lowest Adjacent Ceiling
102	Doom	S1 Floor To Highest Adjacent Floor
102	Heretic	S1 Floor To Highest Adjacent Floor
102	Strife	S1 Floor To Highest Adjacent Floor
103	Doom	S1 Door Stay Open
103	Heretic	S1 Door Stay Open
103	Strife	S1 Door Stay Open
104	Doom	W1 Light To Lowest Adjacent Level
104	Heretic	W1 Light To Lowest Adjacent Level
104	Strife	W1 Light To Lowest Adjacent Level
105	Doom II	WR Door Fast
105	Heretic	W1 Exit (Secret)
105	Strife	WR Door Fast
106	Doom II	WR Door Stay Open Fast
106	Heretic	W1 Build Stairs 16
106	Strife	WR Door Stay Open Fast
107	Doom II	WR Door Close Fast
107	Heretic	S1 Build Stairs 16
107	Strife	WR Door Close Fast
108	Doom II	W1 Door Fast
108	Strife	W1 Door Fast
109	Doom II	W1 Door Stay Open Fast
109	Strife	W1 Door Stay Open Fast
110	Doom II	W1 Door Close Fast
110	Strife	W1 Door Close Fast
111	Doom II	S1 Door Fast
111	Strife	S1 Door Fast
112	Doom II	S1 Door Stay Open Fast
112	Strife	S1 Door Stay Open Fast
113	Doom II	S1 Door Close Fast
113	Strife	S1 Door Close Fast
114	Doom II	SR Door Fast
114	Strife	SR Door Fast
115	Doom II	SR Door Stay Open Fast
115	Strife	SR Door Stay Open Fast
116	Doom II	SR Door Close Fast
116	Strife	SR Door Close Fast
117	Doom II	DR Door Fast
117	Strife	DR Door Fast
118	Doom II	D1 Door Fast
118	Strife	D1 Door Stay Open Fast
119	Doom II	W1 Floor To Higher Adjacent Floor
119	Strife	W1 Floor To Higher Adjacent Floor
120	Doom II	WR Lift Fast
120	Strife	WR Lift Fast
121	Doom II	W1 Lift Fast
121	Strife	W1 Lift Fast
122	Doom II	S1 Lift Fast
122	Strife	S1 Lift Fast
123	Doom II	SR Lift Fast
123	Strife	SR Lift Fast
124	Doom II	W1 Exit (Secret)
124	Strife	W1 Exit (Endgame)
125	Doom II	W1 Teleport Monsters Only
125	Strife	W1 Teleport Monsters Only
126	Doom II	WR Teleport Monsters Only
126	Strife	WR Teleport Monsters Only
127	Doom II	S1 Build Stairs 16 + Crush
127	Strife	S1 Build Stairs 16 Crush
128	Doom II	WR Floor To Higher Adjacent Floor
128	Strife	WR Floor To Higher Adjacent Floor
129	Doom II	WR Floor To Higher Floor Fast
129	Strife	WR Floor To Higher Floor Fast
130	Doom II	W1 Floor To Higher Floor Fast
130	Strife	W1 Floor To Higher Floor Fast
131	Doom II	S1 Floor To Higher Floor Fast
131	Strife	S1 Floor To Higher Floor Fast
132	Doom II	SR Floor To Higher Floor Fast
132	Strife	SR Floor To Higher Floor Fast
133	Doom II	S1 Door Blue Key Fast
133	Strife	S1 Door Fast ID Badge
134	Doom II	SR Door Red Key Fast
134	Strife	SR Door Fast ID Card
135	Doom II	S1 Door Red Key Fast
135	Strife	S1 Door Fast ID Card
136	Doom II	SR Door Yellow Key Fast
136	Strife	SR Door Fast Passcard
137	Doom II	S1 Door Yellow Key Fast
137	Strife	S1 Door Fast Passcard
138	Doom II	SR Light To 255
138	Strife	SR Light To 255
139	Doom II	SR Light To 35
139	Strife	SR Light To 35
140	Doom II	S1 Floor Up 512
140	Strife	S1 Floor Up 512
141	Doom II	W1 Start Crusher, Silent
141	Strife	W1 Start Crusher, Silent
142	Boom	W1 Floor Up 512
142	Strife	Scrolling Wall Up
143	Boom	W1 Lift Up 24 Change Texture
143	Strife	Scrolling Wall Down Triple Speed
144	Boom	W1 Lift Up 24 Remove Type
144	Strife	DR Door Animated
145	Boom	W1 Ceiling Down To Floor Fast
145	Strife	WR Exit To Map #Tag/100 Spot #Tag%100
146	Boom	W1 Floor Donut Raise
146	Strife	S1 Build Stairs 16 Down
147	Boom	WR Floor Up 512
147	Strife	S1 Clear Forcefield // Tagged
148	Boom	WR Lift Up 24 Change Texture
148	Strife	SR Forcefield
149	Boom	WR Lift Up 24 Remove Type
149	Strife	Scrolling Wall Right
150	Boom	WR Start Crusher Silent
150	Strife	WR Raise Alarm
151	Boom	WR Ceiling Up To Highest Ceiling
151	Strife	SR Door Fast Gold Key
152	Boom	WR Ceiling Down To Floor Fast
152	Strife	SR Door Fast Brass Key
153	Boom	W1 Change Floor Texture and Type (Trigger Model)
153	Strife	SR Door Fast Silver Key
154	Boom	WR Change Floor Texture and Type (Trigger Model)
154	Strife	SR Lift If Gold Key
155	Boom	WR Floor Donut Raise
155	Strife	SR Lift Up
156	Boom	WR Light Start Blinking
156	Strife	D1 Door Stay Open Brass Key
157	Boom	WR Light To Lowest Adjacent Level
157	Strife	D1 Door Stay Open Silver Key
158	Boom	S1 Floor Up By Shortest Lower Tex
158	Strife	D1 Door Stay Open Gold Key
159	Boom	S1 Floor To Lowest Adjacent Floor
159	Strife	DR Door Gold Key
160	Boom	S1 Floor Up 24 Change Texture and Type
160	Strife	DR Door Silver Key
161	Boom	S1 Floor Up 24
161	Strife	DR Door Brass Key
162	Boom	S1 Lift Perpetual
162	Strife	S1 Door Fast Brass Key
163	Boom	S1 Lift Stop
163	Strife	S1 Door Fast Silver Key
164	Boom	S1 Start Crusher, Fast Damage
164	Strife	S1 Door Fast Gold Key
165	Boom	S1 Start Crusher Silent
165	Strife	SR Fake Door 'Doesn't Seem To Work'
166	Boom	S1 Ceiling Up To Highest Ceiling
166	Strife	DR Door Severed Hand
167	Boom	S1 Ceiling Down To 8 Above Floor
167	Strife	S1 Door Fast Severed Hand
168	Boom	S1 Stop Crusher
168	Strife	SR Door Fast Severed Hand
169	Boom	S1 Light To Highest Adjacent Level
169	Strife	DR Door Base Key
170	Boom	S1 Light To 35
170	Strife	DR Door Govs Key
171	Boom	S1 Light To 255
171	Strife	S1 Door Fast Prison Key
172	Boom	S1 Light Start Blinking
172	Strife	SR Door Power 1 Key
173	Boom	S1 Light To Lowest Adjacent Level
173	Strife	SR Door Power 2 Key
174	Boom	S1 Teleport
174	Strife	W1 Door Split Open To Lowest
175	Boom	S1 Door Close and Open
175	Strife	WR Raise Alarm If <16 Above Floor
176	Boom	SR Floor Up By Shortest Lower Texture
176	Strife	SR Door Power 3 Key
177	Boom	SR Floor To Lowest Adjacent Floor
177	Strife	SR Lift If Power 3 Key
178	Boom	SR Floor Up 512
178	Strife	W1 Build Stairs 16 Down
179	Boom	SR Floor Up 24 Change Texture and Type
179	Strife	W1 Ceiling To Floor
180	Boom	SR Floor Up 24
180	Strife	G1 Floor Up 512 Change Texture and Type
181	Boom	SR Lift Perpetual
181	Strife	S1 Floor Up 512 Change Texture and Type
182	Boom	SR Lift Stop
182	Strife	G1 Break Glass
183	Boom	SR Start Crusher, Fast Damage
183	Strife	W1 Door Split Open To Nearest
184	Boom	SR Start Crusher
184	Strife	WR Lift
185	Boom	SR Start Crusher Silent
185	Strife	WR Teleport (Silent)
186	Boom	SR Ceiling Up To Highest Ceiling
186	Strife	WR Exit To Map #Tag/100 Spot #Tag%100 (Front Side)
187	Boom	SR Ceiling Down To 8 Above Floor
187	Strife	W1 Clear Forcefield If Quest Item Y Offset // Tagged
188	Boom	SR Stop Crusher
188	Strife	W1 Door Open If Quest Item 16
189	Boom	S1 Change Floor Texture and Type (Trigger Model)
189	Strife	S1 Door Split Open To Lowest Oracle Key
190	Boom	SR Change Floor Texture and Type (Trigger Model)
190	Strife	DR Door Order Key
191	Boom	SR Floor Donut Raise
191	Strife	SR Door Military ID
192	Boom	SR Light To Highest Adjacent Level
192	Strife	SR Door Warehouse Key
193	Boom	SR Light Start Blinking
193	Strife	W1 Floor To Lowest Adjacent Floor If Quest Item from Y Offset owned
194	Boom	SR Light To Lowest Adjacent Level
194	Strife	S1 Door Stay Open Free Prisoners
195	Boom	SR Teleport
195	Strife	WR Teleport (Zombie Changer)
196	Boom	SR Door Close then Open
196	Strife	W1 Floor To Lowest Adjacent Floor If 2+ Sigil Pieces
197	Boom	G1 Exit (Normal)
197	Strife	W1 Door Close Fast If 2+ Sigil Pieces
198	Boom	G1 Exit (Secret)
198	Strife	WR Raise Alarm If No Officer's Uniform
199	Boom	W1 Ceiling Down To Lowest Ceiling
199	Strife	S1 Ceiling To Floor Destroy Converter
200	Boom	W1 Ceiling Down To Highest Floor
200	Strife	W1 Door Open If Sigil Owned
201	Boom	WR Ceiling Down To Lowest Ceiling
201	Strife	W1 Message #Tag (Front Side Only)
202	Boom	WR Ceiling Down To Highest Floor
202	Strife	W1 Message #Tag
203	Boom	S1 Ceiling Down To Lowest Ceiling
203	Strife	W1 Set Music To Map #Tag
204	Boom	S1 Ceiling Down To Highest Floor
204	Strife	W1 Set Music To Map #Tag
205	Boom	SR Ceiling Down To Lowest Ceiling
205	Strife	SR Fake Door 'Only Available In Retail'
206	Boom	SR Ceiling Down To Highest Floor
206	Strife	WR Raise Alarm If Chalice Owned
207	Boom	W1 Teleport Preserve Direction (Silent)
207	Strife	SR Door Animated
208	Boom	WR Teleport Preserve Direction (Silent)
208	Strife	WR Raise Alarm If Flamethrower Owned
209	Boom	S1 Teleport Preserve Direction (Silent)
209	Strife	S1 Build Stairs 16 Down If Chalice Owned
210	Boom	SR Teleport Preserve Direction (Silent)
210	Strife	W1 Message #Tag If Flamethrower (No Log)
211	Boom	SR Toggle Floor To Ceiling (Instant)
211	Strife	SR Message #Tag (No Log)
212	Boom	WR Toggle Floor To Ceiling (Instant)
212	Strife	W1 Floor To Lowest Adjacent Floor If Flamethrower Owned
213	Boom	-- Transfer Floor Light
213	Strife	DR Door Chalice
214	Boom	-- Accelerate Tagged Ceiling w.r.t. 1st Side's Sector
214	Strife	SR Lift Slow
215	Boom	-- Accelerate Tagged Floor w.r.t. 1st Side's Sector
215	Strife	W1 Message #Tag/100 If Quest Item #Tag%100 Owned
216	Boom	-- Accelerate Objects on Tagged Floor w.r.t. 1st Side's Sector
216	Strife	WR Door If Quest Item from Y Offset Owned
217	Boom	-- Accelerate Objects and Tagged Floor w.r.t. 1st Side's Sector
217	Strife	DR Door Core Key
218	Boom	-- Accelerate Tagged Wall w.r.t. 1st Side's Sector
219	Boom	W1 Floor Down To Adjacent Floor
219	Strife	S1 Floor To Higher Adjacent Floor If Blue Crystal Key Owned
220	Boom	WR Floor Down To Adjacent Floor
220	Strife	S1 Floor To Higher Adjacent Floor If Red Crystal Key Owned
221	Boom	S1 Floor Down To Adjacent Floor
221	Strife	DR Door Mauler Key
222	Boom	SR Floor Down To Adjacent Floor
223	Boom	-- Set Friction To Length
223	Strife	SR Door Mine Key
224	Boom	-- Set Wind
224	Strife	DR Door Chapel Key
225	Boom	-- Set Current
225	Strife	DR Door Catacomb Key
226	Boom	-- Point Pusher
226	Strife	S1 Floor To Higher Adjacent Floor If Training Area Complete
227	Boom	W1 Elevator To Higher Floor
227	Strife	W1 Door Close If Quest Item from Y Offset Owned
228	Boom	WR Elevator To Higher Floor
228	Strife	W1 Entity Taunt If Quest Item 24 Owned
229	Boom	S1 Elevator To Higher Floor
229	Strife	SR Door Animated If Sigil Complete
230	Boom	SR Elevator To Higher Floor
230	Strife	W1 Door Open If Quest Item from Y Offset Owned
231	Boom	W1 Elevator To Lower Floor
231	Strife	WR Teleport (Silent Source)
232	Boom	WR Elevator To Lower Floor
232	Strife	DR Door Oracle Pass
233	Boom	S1 Elevator To Lower Floor
233	Strife	SR Door Split Open To Lowest Log Msg 70
234	Boom	SR Elevator To Lower Floor
234	Strife	SR Door If Irale Unlocked
235	Boom	W1 Elevator To Current Floor
235	Strife	S1 Door Split Open To Lowest If Sigil Complete
236	Boom	WR Elevator To Current Floor
237	Boom	S1 Elevator To Current Floor
238	Boom	SR Elevator To Current Floor
239	Boom	W1 Change Floor Texture and Type (Numeric Model)
240	Boom	WR Change Floor Texture and Type (Numeric Model)
241	Boom	S1 Change Floor Texture and Type (Numeric Model)
242	Boom	-- Transfer Heights
243	Boom	W1 Teleport Line
244	Boom	WR Teleport Line
245	Boom	-- Scroll Tagged Ceiling w.r.t. 1st Side's Sector
246	Boom	-- Scroll Tagged Floor w.r.t. 1st Side's Sector
247	Boom	-- Push Objects on Tagged Floor w.r.t. 1st Side's Sector
248	Boom	-- Push Objects & Tagged Floor w.r.t. 1st Side's Sector
249	Boom	-- Scroll Tagged Wall w.r.t. 1st Side's Sector
250	Boom	-- Scroll Tagged Ceiling
251	Boom	-- Scroll Tagged Floor
252	Boom	-- Carry Objects on Tagged Floor
253	Boom	-- Scroll Tagged Floor, Carry Objects
254	Boom	-- Scroll Tagged Wall, Same as Floor/Ceiling
255	Boom	-- Scroll Wall Using Sidedef Offsets
256	Boom	WR Build Stairs 8
257	Boom	WR Build Stairs 16 + Crush
258	Boom	SR Build Stairs 8
259	Boom	SR Build Stairs 16 + Crush
260	Boom	-- Translucent Line
261	Boom	-- Transfer Ceiling Light
262	Boom	W1 Teleport Line (Reversed)
263	Boom	WR Teleport Line (Reversed)
264	Boom	W1 Teleport Line Monsters Only (Reversed)
265	Boom	WR Teleport Line Monsters Only (Reversed)
266	Boom	W1 Teleport Line Monsters Only
267	Boom	WR Teleport Line Monsters Only
268	Boom	W1 Teleport Monsters Only (Silent)
269	Boom	WR Teleport Monsters Only (Silent)
270	Eternity	ExtraDataSpecial
270	ZDoom	WR FS_Execute(tag)
271	MBF	Transfer upper texture to tagged sector sky
272	MBF	Transfer upper texture to tagged sector sky (flipped)
272	SMMU	WR Start FS script with tag number
273	SMMU	WR Start FS script, 1-way trigger
274	SMMU	W1 Start FS script with tag number
275	SMMU	W1 Start FS script, 1-way trigger
276	SMMU	SR Start FS script with tag number
277	SMMU	S1 Start FS script with tag number
278	SMMU	GR Start FS script with tag number
279	SMMU	G1 Start FS script with tag number
280	Legacy	-- Deep Water with Water Colormap
281	Eternity	3DMidTex_MoveWithFloor
281	Legacy	-- Solid 3D Floor with Shadow
282	Eternity	3DMidTex_MoveWithCeiling
282	Legacy	-- Generate Colormap (Upper Tex is RGB, Middle Tex is Fade Distance, Lower Tex is Fade Color)
283	Eternity	Portal_PlaneCeiling
283	Legacy	-- Fog Sheet on Middle Textures
284	Eternity	Portal_PlaneFloor
284	Legacy	-- Translucent Line (TRANSMED)
285	Eternity	Portal_PlaneFloorCeiling
285	Legacy	-- Translucent Line (TRANSMOR)
286	Eternity	Portal_HorizonCeiling
286	Legacy	-- Translucent Line (TRANSHI)
287	Eternity	Portal_HorizonFloor
287	Legacy	-- Translucent Line (TRANSFIR)
288	Eternity	Portal_HorizonFloorCeiling
288	Legacy	-- Translucent Line (TRANSFX1)
289	Eternity	Portal_LineTransfer
289	Legacy	-- Solid 3D Floor without Shadow
290	Eternity	Portal_SkyboxCeiling
290	Legacy	-- Instant Lower Floor
291	Eternity	Portal_SkyboxFloor
291	Legacy	-- Instant Raise Ceiling
292	Eternity	Portal_SkyboxFloorCeiling
293	Eternity	TransferHereticWind
294	Eternity	TransferHereticCurrent
295	Eternity	Portal_AnchoredCeiling
296	Eternity	Portal_AnchoredFloor
297	Eternity	Portal_AnchoredFloorCeiling
298	Eternity	Portal_AnchorLine
299	Eternity	Portal_AnchorLineFloor
300	Eternity	Door_Raise (param)
300	Legacy	-- Solid Translucent 3D Floor (Upper Texture is Alpha, default 128)
301	Eternity	Door_Open (param)
301	Legacy	-- Translucent 3D Water (Upper Texture is Alpha + Fog, default 127A)
302	Eternity	Door_Close (param)
302	Legacy	-- 3D Fog (Upper Texture is Alpha + Fog, default 110F)
303	Eternity	Door_CloseWaitOpen (param)
303	Legacy	-- 3D Ceiling Light Effect
304	Eternity	Door_WaitRaise (param)
304	Legacy	-- Opaque Water (Upper Texture is Alpha + Fog, default 190A)
305	Eternity	Door_WaitClose (param)
305	Legacy	-- 3D Light Effect
306	Eternity	Floor_RaiseToHighest (param)
306	Legacy	-- Invisible Floor
307	Eternity	Floor_LowerToHighest (param)
308	Eternity	Floor_RaiseToLowest (param)
309	Eternity	Floor_LowerToLowest (param)
310	Eternity	Floor_RaiseToNearest (param)
311	Eternity	Floor_LowerToNearest (param)
312	Eternity	Floor_RaiseToLowestCeiling (param)
313	Eternity	Floor_LowerToLowestCeiling (param)
314	Eternity	Floor_RaiseToCeiling (param)
315	Eternity	Floor_RaiseByTexture (param)
316	Eternity	Floor_LowerByTexture (param)
317	Eternity	Floor_RaiseByValue (param)
318	Eternity	Floor_LowerByValue (param)
319	Eternity	Floor_MoveToValue (param)
320	Eternity	Floor_RaiseInstant (param)
321	Eternity	Floor_LowerInstant (param)
322	Eternity	Floor_ToCeilingInstant (param)
323	Eternity	Ceiling_RaiseToHighest (param)
324	Eternity	Ceiling_ToHighestInstant (param)
325	Eternity	Ceiling_RaiseToNearest (param)
326	Eternity	Ceiling_LowerToNearest (param)
327	Eternity	Ceiling_RaiseToLowest (param)
328	Eternity	Ceiling_LowerToLowest (param)
329	Eternity	Ceiling_RaiseToHighestFloor (param)
330	Eternity	Ceiling_LowerToHighestFloor (param)
331	Eternity	Ceiling_ToFloorInstant (param)
332	Eternity	Ceiling_LowerToFloor (param)
333	Eternity	Ceiling_RaiseByTexture (param)
333	ZDoom	Static_Init (tag, Init_Gravity)
334	Eternity	Ceiling_LowerByTexture (param)
334	ZDoom	Static_Init (tag, Init_Color)
335	Eternity	Ceiling_RaiseByValue (param)
335	ZDoom	Static_Init (tag, Init_Damage)
336	Eternity	Ceiling_LowerByValue (param)
336	ZDoom	Line_Mirror ()
337	Eternity	Ceiling_MoveToValue (param)
337	ZDoom	Line_Horizon ()
338	Eternity	Ceiling_RaiseInstant (param)
338	ZDoom	W1 Floor_Waggle (tag, 24, 32, 0, 0)
339	Eternity	Ceiling_LowerInstant (param)
339	ZDoom	W1 Floor_Waggle (tag, 12, 32, 0, 0)
340	Eternity	Stairs_BuildUpDoom (param)
340	ZDoom	Plane_Align (1, 0) // Slope front floor
341	Eternity	Stairs_BuildDownDoom (param)
341	ZDoom	Plane_Align (0, 1) // Slope front ceiling
342	Eternity	Stairs_BuildUpDoomSync (param)
342	ZDoom	Plane_Align (1, 1) // Slope front floor and ceiling
343	Eternity	Stairs_BuildDownDoomSync (param)
343	ZDoom	Plane_Align (2, 0) // Slope back floor
344	Eternity	Portal_TwowayCeiling
344	ZDoom	Plane_Align (0, 2) // Slope back ceiling
345	Eternity	Portal_TwowayFloor
345	ZDoom	Plane_Align (2, 2) // Slope back floor and ceiling
346	Eternity	Portal_TwowayAnchorLine
346	ZDoom	Plane_Align (2, 1) // Slope b.f. and f.c.
347	Eternity	Portal_TwowayAnchorLineFloor
347	ZDoom	Plane_Align (1, 2) // Slope f.f. and b.c.
348	Eternity	Polyobj_StartLine (param)
348	ZDoom	W1 Autosave ()
349	Eternity	Polyobj_ExplicitLine (param)
349	ZDoom	S1 Autosave ()
350	Eternity	Polyobj_DoorSlide (param)
350	ZDoom	Transfer_Heights (tag, 2) // Just fake the floor
351	Eternity	Polyobj_DoorSwing (param)
351	ZDoom	Transfer_Heights (tag, 6) // Just fake the floor and clip it too
352	Eternity	Polyobj_Move (param)
352	ZDoom	Sector_CopyScroller(tag, 1) // copy ceiling scroller
353	Eternity	Polyobj_OR_Move (param)
353	ZDoom	Sector_CopyScroller(tag, 2) // copy floor scroller
354	Eternity	Polyobj_RotateRight (param)
354	ZDoom	Sector_CopyScroller(tag, 6) // copy carrying floor scroller
355	Eternity	Polyobj_OR_RotateRight (param)
356	Eternity	Polyobj_RotateLeft (param)
357	Eternity	Polyobj_OR_RotateLeft (param)
358	Eternity	Portal_LinkedCeiling
359	Eternity	Portal_LinkedFloor
360	Eternity	Portal_LinkedAnchorLine
361	Eternity	Portal_LinkedAnchorLineFloor
362	Eternity	Pillar_Build (param)
363	Eternity	Pillar_BuildAndCrush (param)
364	Eternity	Pillar_Open (param)
365	Eternity	ACS_Execute (param)
366	Eternity	ACS_Suspend (param)
367	Eternity	ACS_Terminate (param)
368	Eternity	Light_RaiseByValue (param)
369	Eternity	Light_LowerByValue (param)
370	Eternity	Light_ChangeToValue (param)
371	Eternity	Light_Fade (param)
372	Eternity	Light_Glow (param)
373	Eternity	Light_Flicker (param)
374	Eternity	Light_Strobe (param)
375	Eternity	Radius_Quake (param)
376	Eternity	Portal_LinkedLineToLine
377	Eternity	Portal_LinkedLineToLineAnchor
378	Eternity	Line_SetIdentification (param)
379	Eternity	Attach_SetCeilingControl
380	Eternity	Attach_SetFloorControl
381	Eternity	Attach_FloorToControl
382	Eternity	Attach_CeilingToControl
383	Eternity	Attach_MirrorFloorToControl
384	Eternity	Attach_MirrorCeilingToControl
385	Eternity	Apply_PortalToFrontsector
386	Eternity	Slope_FrontsectorFloor
387	Eternity	Slope_FrontsectorCeiling
388	Eternity	Slope_FrontsectorFloorAndCeiling
389	Eternity	Slope_BacksectorFloor
390	Eternity	Slope_BacksectorCeiling
391	Eternity	Slope_BacksectorFloorAndCeiling
392	Eternity	Slope_BackFloorAndFrontCeiling
393	Eternity	Slope_BackCeilingAndFrontFloor
394	Eternity	Slope_FrontFloorToTaggedSlope
395	Eternity	Slope_FrontCeilingToTaggedSlope
396	Eternity	Slope_FrontFloorAndCeilingToTaggedSlope
397	Eternity	Floor_Waggle (param)
398	Eternity	Thing_Spawn (param)
399	Eternity	Thing_SpawnNoFog (param)
400	EDGE	Thick Extrafloor
400	Eternity	Teleport_EndGame (param)
401	EDGE	Thick Extrafloor (use upper texture)
402	EDGE	Thick Extrafloor (use lower texture)
403	EDGE	Liquid Extrafloor (Opaque)
404	EDGE	Liquid Extrafloor (80% Translucent)
405	EDGE	Liquid Extrafloor (60% Translucent)
406	EDGE	Liquid Extrafloor (40% Translucent)
407	EDGE	Liquid Extrafloor (20% Translucent)
408	EDGE	Liquid Extrafloor (Invisible)
409	EDGE	Translucent Linedef (80%)
410	EDGE	Translucent Linedef (60%)
411	EDGE	Translucent Linedef (40%)
412	EDGE	Translucent Linedef (20%)
413	EDGE	Thin Extrafloor (Opaque)
414	EDGE	Thin Extrafloor (80% Translucent)
415	EDGE	Thin Extrafloor (60% Translucent)
416	EDGE	Thin Extrafloor (40% Translucent)
417	EDGE	Thin Extrafloor (20% Translucent)
418	EDGE	Enable Tagged RTS - S1
419	EDGE	Enable Tagged RTS - SR
420	EDGE	Enable Tagged RTS - W1
421	EDGE	Enable Tagged RTS - WR
422	EDGE	SCROLL RIGHT
423	EDGE	SCROLL UP
424	EDGE	SCROLL DOWN
425	EDGE	SCROLL LEFT AND UP
426	EDGE	SCROLL LEFT AND DOWN
427	EDGE	SCROLL RIGHT AND UP
428	EDGE	SCROLL RIGHT AND DOWN
429	EDGE	SCROLL FAST LOWER AND MIDDLE TEXTURE (WATERFALLS)
434	EDGE	S1, RAISE FLOOR 2 UNITS (USE FOR RTS ONHEIGHT EVENTS)
435	EDGE	SR, RAISE FLOOR 2 UNITS (USE FOR RTS ONHEIGHT EVENTS)
436	EDGE	W1, RAISE FLOOR 2 UNITS (USE FOR RTS ONHEIGHT EVENTS)
437	EDGE	WR, RAISE FLOOR 2 UNITS (USE FOR RTS ONHEIGHT EVENTS)
438	EDGE	G1, RAISE FLOOR 2 UNITS (USE FOR RTS ONHEIGHT EVENTS)
439	EDGE	GR, RAISE FLOOR 2 UNITS (USE FOR RTS ONHEIGHT EVENTS)
440	EDGE	Enable Tagged RTS - G1
441	EDGE	Enable Tagged RTS - GR
442	EDGE	Sliding door (LEFT), DR + MONSTERS
443	EDGE	Sliding door (LEFT), DR
444	EDGE	Sliding door (LEFT), DR + FAST
445	EDGE	Sliding door (LEFT), D1
446	EDGE	Sliding door (RIGHT), DR + MONSTERS
447	EDGE	Sliding door (RIGHT), DR
448	EDGE	Sliding door (RIGHT), DR + FAST
449	EDGE	Sliding door (RIGHT), D1
450	EDGE	Sliding door (CENTER), DR + MONSTERS
451	EDGE	Sliding door (CENTER), DR
452	EDGE	Sliding door (CENTER), DR + FAST
453	EDGE	Sliding door (CENTER), D1
454	EDGE	Enable Tagged RTS - W1 MONSTER
455	EDGE	Enable Tagged RTS - WR MONSTER
456	EDGE	Enable Tagged RTS - GR MONSTER
457	EDGE	Disable Tagged RTS - SR
458	EDGE	Disable Tagged RTS - WR
459	EDGE	Disable Tagged RTS - GR
460	EDGE	Disable Tagged RTS - WR MONSTER
461	EDGE	Disable Tagged RTS - GR MONSTER
462	EDGE	Mirror (Plain)
463	EDGE	Mirror (White)
464	EDGE	Mirror (Blue)
465	EDGE	Mirror (Red)
466	EDGE	Mirror (Green)
470	EDGE	Ladder, 48 units high
471	EDGE	Ladder, 80 units high
472	EDGE	Ladder, 120 units high
473	EDGE	Ladder, 160 units high
474	EDGE	Ladder, 192 units high
475	EDGE	Ladder, 256 units high
476	EDGE	Ladder, 384 units high
477	EDGE	Ladder, 512 units high
478	EDGE	Ladder, 768 units high
479	EDGE	Ladder, no limit
480	EDGE	Portal (Dark 50%)
481	EDGE	Portal (Light 30%)
482	EDGE	Portal (Light 70%)
483	EDGE	Portal (Blue 70%)
484	EDGE	Portal (Green 70%)
485	EDGE	Camera Portal (Plain)
486	EDGE	Camera Portal (White)
487	EDGE	Camera Portal (Cyan)
488	EDGE	Camera Portal (Rusty)
489	EDGE	Camera Portal (Green)
490	EDGE	Green Key DOOR - DR
491	EDGE	Green Key DOOR - D1
492	EDGE	Green Key DOOR - SR
493	EDGE	Green Key DOOR - S1
494	EDGE	Green Key BLAZING DOOR - D1
501	EDGE	Hub Exit to MAP01 / E1M1
502	EDGE	Hub Exit to MAP02 / E1M2
503	EDGE	Hub Exit to MAP03 / E1M3
504	EDGE	Hub Exit to MAP04 / E1M4
505	EDGE	Hub Exit to MAP05 / E1M5
506	EDGE	Hub Exit to MAP06 / E1M6
507	EDGE	Hub Exit to MAP07 / E1M7
508	EDGE	Hub Exit to MAP08 / E1M8
509	EDGE	Hub Exit to MAP09 / E1M9
510	EDGE	Hub Exit to MAP10
511	EDGE	Hub Exit to MAP11 / E2M1
512	EDGE	Hub Exit to MAP12 / E2M2
513	EDGE	Hub Exit to MAP13 / E2M3
514	EDGE	Hub Exit to MAP14 / E2M4
515	EDGE	Hub Exit to MAP15 / E2M5
516	EDGE	Hub Exit to MAP16 / E2M6
517	EDGE	Hub Exit to MAP17 / E2M7
518	EDGE	Hub Exit to MAP18 / E2M8
519	EDGE	Hub Exit to MAP19 / E2M9
520	EDGE	Hub Exit to MAP20
521	EDGE	Hub Exit to MAP21 / E3M1
522	EDGE	Hub Exit to MAP22 / E3M2
523	EDGE	Hub Exit to MAP23 / E3M3
524	EDGE	Hub Exit to MAP24 / E3M4
525	EDGE	Hub Exit to MAP25 / E3M5
526	EDGE	Hub Exit to MAP26 / E3M6
527	EDGE	Hub Exit to MAP27 / E3M7
528	EDGE	Hub Exit to MAP28 / E3M8
529	EDGE	Hub Exit to MAP29 / E3M9
530	EDGE	Hub Exit to MAP30
531	EDGE	Hub Exit to MAP31 / E4M1
532	EDGE	Hub Exit to MAP32 / E4M2
533	EDGE	Hub Exit to MAP33 / E4M3
534	EDGE	Hub Exit to MAP34 / E4M4
535	EDGE	Hub Exit to MAP35 / E4M5
536	EDGE	Hub Exit to MAP36 / E4M6
537	EDGE	Hub Exit to MAP37 / E4M7
538	EDGE	Hub Exit to MAP38 / E4M8
539	EDGE	Hub Exit to MAP39 / E4M9
567	EDGE	Detail Slope - FLOOR
568	EDGE	Detail Slope - CEILING
569	EDGE	Detail Slope - FLOOR+CEILING
580	EDGE	Gold Key DOOR - DR
581	EDGE	Gold Key DOOR - D1
582	EDGE	Gold Key DOOR - SR
583	EDGE	Gold Key DOOR - S1
584	EDGE	Silver Key DOOR - DR
585	EDGE	Silver Key DOOR - D1
586	EDGE	Silver Key DOOR - SR
587	EDGE	Silver Key DOOR - S1
588	EDGE	Brass Key DOOR - DR
589	EDGE	Brass Key DOOR - D1
590	EDGE	Copper Key DOOR - DR
591	EDGE	Copper Key DOOR - D1
592	EDGE	Steel Key DOOR - DR
593	EDGE	Steel Key DOOR - D1
594	EDGE	Wooden Key DOOR - DR
595	EDGE	Wooden Key DOOR - D1
596	EDGE	Fire Key DOOR - DR
597	EDGE	Fire Key DOOR - D1
598	EDGE	Water Key DOOR - DR
599	EDGE	Water Key DOOR - D1
800	EDGE	Align and rotate front sector's FLOOR
801	EDGE	Align and rotate back sector's FLOOR
802	EDGE	Align and rotate front sector's CEILING
803	EDGE	Align and rotate back sector's CEILING
804	EDGE	Align and rotate front sector's FLOOR+CEILING
805	EDGE	Align and rotate back sector's FLOOR+CEILING
810	EDGE	Align, scale and rotate front sector's FLOOR
811	EDGE	Align, scale and rotate back sector's FLOOR
812	EDGE	Align, scale and rotate front sector's CEILING
813	EDGE	Align, scale and rotate back sector's CEILING
814	EDGE	Align, scale and rotate front sector's FLOOR+CEILING
815	EDGE	Align, scale and rotate back sector's FLOOR+CEILING
820	EDGE	Scale front sector's FLOOR
821	EDGE	Scale back sector's FLOOR
822	EDGE	Scale front sector's CEILING
823	EDGE	Scale back sector's CEILING
824	EDGE	Scale front sector's FLOOR+CEILING
825	EDGE	Scale back sector's FLOOR+CEILING

Differences between games

Line types originating from Doom (type 1–98 and 101–104) are part of the codebase that went into Heretic and Strife. However, there have been changes made which result in different behavior in these shared types. The first version of Final Doom has a minor change that was reverted in a later build.

Doom below version 1.25

The code specifying which sector to copy the data from was modified in version 1.25 for certain linedef specials, which resulted in an impact on the floors that descend into a blood pool in E3M1: Hell Keep.

Doom below version 1.4

Player and monster projectiles can trigger linedef types that can be triggered by monsters. From this version on only the new projectiles added in Doom 2 can trigger such linedef specials.

Final Doom

Teleporter lines behave slightly different in the first released build of this game. The height is not reset when teleporting, leading to drops from above if the destination is below the origination sector. This is fixed in the updated release.

Heretic

The game supports the linedef types 1–98 and 101–104 from Doom, with a few changes. Linedef types 99, 100, and 105–107 have different actions in Heretic. There is only one type of key (as opposed to Doom with its skull keys and key cards), with either a blue, green, or yellow color.

• Type 4, 39, and 97 can be activated by all monsters and projectiles since there are no exceptions as found in later versions of Doom.
• Type 7 and 8 rising stairs move four times faster.
• Type 10 and 88 lifts cannot be activated by monsters.
• Type 49 crusher does not move back and forth.
• Type 70, 71, 98 floors lower and always adjust the height to 8 above highest adjacent floor, but in Doom only adjust if the adjacent floors are lower than the starting height.
• Type 99 scrolls a texture to the right. Doom only has left-scrolling.
• Type 100 WR, fast open door (closes after 6 seconds).
• Type 105 W1, exit to secret level, this one is type 124 in Doom.
• Type 106 W1, raise stairs with 16 unit steps, same speed as 7 and 8.
• Type 107 S1, raise stairs with 16 unit steps, same speed as 7 and 8.

Hexen

In Hexen, linedef actions and triggers are independent of one another, instead of being hard-coded like Doom-format maps. Linedef types can be set directly on linedefs, or indirectly via ACS scripts.

Strife

Contains line types from Doom II up to type 141. Locked doors use different keys and there are also many more key types.

• Type 6 crusher is twice as fast.
• Type 11 exit can be parameterized to an arbitrary level by using the line's sector tag.
• Type 25, 73 crushers deal no damage.
• Type 31 door can be used by monsters.
• Type 32, 33, 34 locked doors cannot be used by monsters, even once unlocked.
• Type 36 floor movement makes it flush with the highest adjacent floor, without stopping 8 units short.
• Type 44, 72 lowering ceilings deal damage.
• Type 49 crusher deals no damage.
• Type 51, 124 exits end the game instead of being a secret exit.
• Type 52 exit can be parameterized to an arbitrary level by using the line's sector tag x100.
• Type 58, 93 floors rise by 64 instead of 24.
• Type 70, 71, 98 floors lower to be flush with the highest adjacent floor, without stopping 8 units short.
• Type 77 crusher is twice as fast.
• Type 134, 136 locked doors do not stay open.

Others

The Chex Quest series and Hacx make no changes to the game engine itself, only graphical and (in the case of Hacx) behavioral changes.

Terminology

In Boom (like Doom), actions are caused to happen through linedef types. Boom has three kinds of linedef types:

• Regular - the linedef types that were already in Doom II v1.9
• Extended - linedef types not in Doom II v1.9 but less than 8192 in value
• Generalized - linedef types over 8192 in value that contain bit fields that independently control the actions of the sector affected.

A linedef with a non-zero linedef type is called a linedef trigger. A linedef trigger is always activated in one of three ways—pushing on the first sidedef of the linedef, walking over the linedef, or shooting the linedef with an impact weapon.

Linedefs activated by pushing on them come in two varieties. A manual linedef affects the sector on the second sidedef of the line pushed. A switched linedef affects all sectors that have the same tag field as the linedef that was pushed.

Nearly all switched, walkover, and gun linedefs operate on the sectors with the same tag as that in the tag field of the linedef.

Some linedefs are never activated per se, but simply create or control an effect through their existence and properties, usually affecting the sectors sharing the linedef's tags. There are also a few special cases like line-line teleporters and exit linedefs that do not affect sectors.

Some linedefs are only triggerable once, others are triggerable as many times as you like.

Triggering types are denoted by the letters P, S, W, and G for manual (push), switched, walkover, and gun. Their retriggerability is denoted by a 1 or R following the letter. So the triggering types for linedefs are:

P1 PR S1 SR W1 WR G1 GR

You will sometimes see triggering types D1 and DR mentioned. This is just different notation for the P1 and PR triggering types. The D stands for "door", which makes sense for the regular Doom types, but P (for "push") is more general—the Boom generalized types can be used to construct "manual" floors, ceilings, lifts, stairs and crushers in addition to doors.

Often linedef actions depend on values in neighboring sectors. A neighboring sector is one that shares a linedef in common, just sharing a vertex is not sufficient.

In Doom only one action on a sector could occur at a time. Boom supports one floor action, one ceiling action, and one lighting action simultaneously. Many Boom-supporting source ports also make this change.

Doors

A door is a sector, usually placed between two rooms, whose ceiling rises to open, and lowers to close.

A door is fully closed when its ceiling height is equal to its floor height.

A door is fully open when its ceiling height is 4 less than the lowest neighbor ceiling adjacent to it.

A door may be set to an intermediate state initially, or thru the action of a linedef trigger that affects ceilings or floors. The door is passable to a player when its ceiling is at least 56 units higher than its floor. In general the door is passable to a monster or a thing when its ceiling is at least the monster or thing's height above the floor.

If a door has a ceiling height ABOVE the fully open height, then an open door action moves the ceiling to the fully open height instantly.

If a door has a ceiling height BELOW the fully closed height (that is the ceiling of the door sector is lower than the floor of the door sector) a close door action moves the ceiling to the fully closed height instantly.

Door functions

• Open, Wait, Then Close - On activation, door opens fully, waits a specified period, then closes fully.

• Open and Stay Open - On activation, door opens fully and remains there.

• Close and Stay Closed - On activation, door closes fully, and remains there.

• Close, Wait, Then Open - On activation, door closes fully, waits a specified period, then opens fully.

Varieties of doors

A door can be triggered by pushing on it, walking over or pressing a linedef trigger tagged to it, or shooting a linedef tagged to it. These are called manual, walkover, switched, or gun doors resp.

Since a push door (P1/PR) has no use for its tag, Boom has extended the functionality to include changing any tagged sectors to maximum neighbor lighting on fully opening, then to minimum neighbor lighting on fully closing. This is true for regular, extended, and generalized doors with push triggers.

A door trigger can be locked. This means that the door function will only operate if the player is in possession of the right key(s). Regular and extended door triggers only care if the player has a key of the right color, they do not care which. Generalized door triggers can distinguish between skull and card keys, and can also require any key, or all keys in order to activate.

A door can have different speeds, slow, normal, fast or turbo.

A door can wait for different amounts of time.

A door may or may not be activatable by monsters.

Any door function except Close and Stay Closed, when closing and encountering a monster or player's head will bounce harmlessly off that head and return to fully open. A Close and Stay Closed will rest on the head until it leaves the door sector.

Door linedef types

Regular and extended door types

#	Class	Trig	Lock	Speed	Wait	Monst	Function
1	Reg	PR	No	Slow	4s	Yes	Open, Wait, Then Close
117	Reg	PR	No	Fast	4s	No	Open, Wait, Then Close
63	Reg	SR	No	Slow	4s	No	Open, Wait, Then Close
114	Reg	SR	No	Fast	4s	No	Open, Wait, Then Close
29	Reg	S1	No	Slow	4s	No	Open, Wait, Then Close
111	Reg	S1	No	Fast	4s	No	Open, Wait, Then Close
90	Reg	WR	No	Slow	4s	No	Open, Wait, Then Close
105	Reg	WR	No	Fast	4s	No	Open, Wait, Then Close
4	Reg	W1	No	Slow	4s	Yes	Open, Wait, Then Close
108	Reg	W1	No	Fast	4s	No	Open, Wait, Then Close
31	Reg	P1	No	Slow	--	No	Open and Stay Open
118	Reg	P1	No	Fast	--	No	Open and Stay Open
61	Reg	SR	No	Slow	--	No	Open and Stay Open
115	Reg	SR	No	Fast	--	No	Open and Stay Open
103	Reg	S1	No	Slow	--	No	Open and Stay Open
112	Reg	S1	No	Fast	--	No	Open and Stay Open
86	Reg	WR	No	Slow	--	No	Open and Stay Open
106	Reg	WR	No	Fast	--	No	Open and Stay Open
2	Reg	W1	No	Slow	--	No	Open and Stay Open
109	Reg	W1	No	Fast	--	No	Open and Stay Open
46	Reg	GR	No	Slow	--	Yes	Open and Stay Open
42	Reg	SR	No	Slow	--	No	Close and Stay Closed
116	Reg	SR	No	Fast	--	No	Close and Stay Closed
50	Reg	S1	No	Slow	--	No	Close and Stay Closed
113	Reg	S1	No	Fast	--	No	Close and Stay Closed
75	Reg	WR	No	Slow	--	No	Close and Stay Closed
107	Reg	WR	No	Fast	--	No	Close and Stay Closed
3	Reg	W1	No	Slow	--	No	Close and Stay Closed
110	Reg	W1	No	Fast	--	No	Close and Stay Closed
196	Ext	SR	No	Slow	30s	No	Close, Wait, Then Open
175	Ext	S1	No	Slow	30s	No	Close, Wait, Then Open
76	Reg	WR	No	Slow	30s	No	Close, Wait, Then Open
16	Reg	W1	No	Slow	30s	No	Close, Wait, Then Open

Regular and extended locked door types

#	Class	Trig	Lock	Speed	Wait	Monst	Function
26	Reg	PR	Blue	Slow	4s	No	Open, Wait, Then Close
28	Reg	PR	Red	Slow	4s	No	Open, Wait, Then Close
27	Reg	PR	Yell	Slow	4s	No	Open, Wait, Then Close
32	Reg	P1	Blue	Slow	--	No	Open and Stay Open
33	Reg	P1	Red	Slow	--	No	Open and Stay Open
34	Reg	P1	Yell	Slow	--	No	Open and Stay Open
99	Reg	SR	Blue	Fast	--	No	Open and Stay Open
134	Reg	SR	Red	Fast	--	No	Open and Stay Open
136	Reg	SR	Yell	Fast	--	No	Open and Stay Open
133	Reg	S1	Blue	Fast	--	No	Open and Stay Open
135	Reg	S1	Red	Fast	--	No	Open and Stay Open
137	Reg	S1	Yell	Fast	--	No	Open and Stay Open

There are two generalized door linedef types, Generalized Door, and Generalized Locked Door. The following tables show the possibilities for each parameter, any combination of parameters is allowed:

Slow and Fast represent the same speeds as slow and fast regular doors. Normal is twice as fast as slow, Fast is twice normal, Turbo is twice Fast.

Generalized door types

#	Class	Trig	Lock	Speed	Wait	Monst	Function
3C00H-4000H	Gen	P1/PR	No	Slow	1s	Yes	Open, Wait, Then Close
		S1/SR		Normal	4s	No	Open and Stay Open
		W1/WR		Fast	9s		Close and Stay Closed
		G1/GR		Turbo	30s		Close, Wait, Then Open

Generalized locked door types

#	Class	Trig	Lock	Speed	Wait	Monst	Function
3800H-3C00H	Gen	P1/PR	Any	Slow	1s	No	Open, Wait, Then Close
		S1/SR	Blue	Normal	4s		Open and Stay Open
		W1/WR	Red	Fast	9s		Close and Stay Closed
		G1/GR	Yell	Turbo	30s		Close, Wait, Then Open
			BlueC
			RedC
			YellC
			BlueS
			RedS
			YellS
			All3
			All6

Floors

Floor targets

Lowest Neighbor Floor (LnF)

This means that the floor moves to the height of the lowest neighboring floor including the floor itself. If the floor direction is up (only possible with generalized floors) motion is instant, else at the floor's speed.

Next Neighbor Floor (NnF)

This means that the floor moves up to the height of the lowest adjacent floor greater in height than the current, or down to the height of the highest adjacent floor less in height than the current, as determined by the floor's direction. Instant motion is not possible in this case. If no such floor exists, the floor does not move.

Lowest Neighbor Ceiling (LnC)

This means that the floor height changes to the height of the lowest ceiling possessed by any neighboring sector, including that floor's ceiling. If the target height is in the opposite direction to floor motion, motion is instant, otherwise at the floor action's speed.

8 Under Lowest Neighbor Ceiling (8uLnC)

This means that the floor height changes to 8 less than the height of the lowest ceiling possessed by any neighboring sector, including that floor's ceiling. If the target height is in the opposite direction to floor motion, motion is instant, otherwise at the floor action's speed.

Highest Neighbor Floor (HnF)

This means that the floor height changes to the height of the highest neighboring floor, excluding the floor itself. If no neighbor floor exists, the floor moves down to -32000. If the target height is in the opposite direction to floor motion, the motion is instant, otherwise it occurs at the floor action's speed.

8 Above Highest Neighbor Floor (8aHnF)

This means that the floor height changes to 8 above the height of the highest neighboring floor, excluding the floor itself. If no neighbor floor exists, the floor moves down to -31992. If the target height is in the opposite direction to floor motion, the motion is instant, otherwise it occurs at the floor action's speed.

Ceiling

The floor moves up until it is at ceiling height, instantly if floor direction is down (only available with generalized types), at the floor speed if the direction is up.

24 Units (24)

The floor moves 24 units in the floor action's direction. Instant motion is not possible with this linedef type.

32 Units (32)

The floor moves 32 units in the floor action's direction. Instant motion is not possible with this linedef type.

512 Units (512)

The floor moves 512 units in the floor action's direction. Instant motion is not possible with this linedef type.

Shortest Lower Texture (SLT)

The floor moves to the height of the shortest lower texture on the boundary of the sector, in the floor direction. Instant motion is not possible with this type. In the case that there is no surrounding texture the motion is to -32000 or +32000 depending on direction.

None

Some pure texture type changes are provided for changing the floor texture and/or sector type without moving the floor.

Varieties of floors

A floor can be activated by pushing on a linedef bounding it (generalized types only), or by pushing on a switch with the same tag as the floor sector, or by walking over a linedef with the same tag as the floor, or by shooting a linedef with the same tag as the floor with an impact weapon.

A floor can move either Up or Down.

A floor can move with speeds of Slow, Normal, Fast, or Turbo. If the target height specified by the floor function (see Floor Targets above) is in the opposite direction to the floor's motion, then travel is instantaneous, otherwise it happens at the speed specified.

A floor action can be a texture change type, in which case after the action the floor texture of the affected floor, and possibly the sector type of the affected floor are changed to those of a model sector. The sector type may be zeroed instead of copied from the model, or not changed at all. These change types are referred to below as Tx (texture only), Tx0 (type zeroed), and TxTy (texture and type changed). The model sector for the change may be the sector on the first sidedef of the trigger (trigger model) or the sector with floor at destination height across the lowest numbered two-sided linedef surrounding the affected sector (numeric model). If no model sector exists, no change occurs. If a change occurs, floor texture is always affected, lighting is never affected, even that corresponding to the sector's type, nor is any other sector property other than the sector's type.

Numeric model algorithm:

1. Find all floors adjacent to the tagged floor at destination height
2. Find the lowest numbered linedef separating those floors from that tagged
3. The sector on the other side of that linedef is the model

A floor action can have the crush property, in which case players and monsters are crushed when the floor tries to move above the point where they fit exactly underneath the ceiling. This means they take damage until they die, leave the sector, or the floor action is stopped.

A floor action never reverses on encountering an obstacle, even if the crush property is not true, the floor merely remains in the same position until the obstacle is removed or dies, then continues.

Floor linedef types

Regular and extended floor types

#	Class	Trig	Dir	Spd	Chg	Mdl	Mon	Crsh	Target
60	Reg	SR	Dn	Slow	None	--	No	No	Lowest Neighbor Floor
23	Reg	S1	Dn	Slow	None	--	No	No	Lowest Neighbor Floor
82	Reg	WR	Dn	Slow	None	--	No	No	Lowest Neighbor Floor
38	Reg	W1	Dn	Slow	None	--	No	No	Lowest Neighbor Floor
177	Ext	SR	Dn	Slow	TxTy	Num	No	No	Lowest Neighbor Floor
159	Ext	S1	Dn	Slow	TxTy	Num	No	No	Lowest Neighbor Floor
84	Reg	WR	Dn	Slow	TxTy	Num	No	No	Lowest Neighbor Floor
37	Reg	W1	Dn	Slow	TxTy	Num	No	No	Lowest Neighbor Floor
69	Reg	SR	Up	Slow	None	--	No	No	Next Neighbor Floor
18	Reg	S1	Up	Slow	None	--	No	No	Next Neighbor Floor
128	Reg	WR	Up	Slow	None	--	No	No	Next Neighbor Floor
119	Reg	W1	Up	Slow	None	--	No	No	Next Neighbor Floor
132	Reg	SR	Up	Fast	None	--	No	No	Next Neighbor Floor
131	Reg	S1	Up	Fast	None	--	No	No	Next Neighbor Floor
129	Reg	WR	Up	Fast	None	--	No	No	Next Neighbor Floor
130	Reg	W1	Up	Fast	None	--	No	No	Next Neighbor Floor
222	Ext	SR	Dn	Slow	None	--	No	No	Next Neighbor Floor
221	Ext	S1	Dn	Slow	None	--	No	No	Next Neighbor Floor
220	Ext	WR	Dn	Slow	None	--	No	No	Next Neighbor Floor
219	Ext	W1	Dn	Slow	None	--	No	No	Next Neighbor Floor
64	Reg	SR	Up	Slow	None	--	No	No	Lowest Neighbor Ceiling
101	Reg	S1	Up	Slow	None	--	No	No	Lowest Neighbor Ceiling
91	Reg	WR	Up	Slow	None	--	No	No	Lowest Neighbor Ceiling
5	Reg	W1	Up	Slow	None	--	No	No	Lowest Neighbor Ceiling
24	Reg	G1	Up	Slow	None	--	No	No	Lowest Neighbor Ceiling
65	Reg	SR	Up	Slow	None	--	No	Yes	Lowest Neighbor Ceiling - 8
55	Reg	S1	Up	Slow	None	--	No	Yes	Lowest Neighbor Ceiling - 8
94	Reg	WR	Up	Slow	None	--	No	Yes	Lowest Neighbor Ceiling - 8
56	Reg	W1	Up	Slow	None	--	No	Yes	Lowest Neighbor Ceiling - 8
45	Reg	SR	Dn	Slow	None	--	No	No	Highest Neighbor Floor
102	Reg	S1	Dn	Slow	None	--	No	No	Highest Neighbor Floor
83	Reg	WR	Dn	Slow	None	--	No	No	Highest Neighbor Floor
19	Reg	W1	Dn	Slow	None	--	No	No	Highest Neighbor Floor
70	Reg	SR	Dn	Fast	None	--	No	No	Highest Neighbor Floor + 8
71	Reg	S1	Dn	Fast	None	--	No	No	Highest Neighbor Floor + 8
98	Reg	WR	Dn	Fast	None	--	No	No	Highest Neighbor Floor + 8
36	Reg	W1	Dn	Fast	None	--	No	No	Highest Neighbor Floor + 8
180	Ext	SR	Up	Slow	None	--	No	No	Absolute 24
161	Ext	S1	Up	Slow	None	--	No	No	Absolute 24
92	Reg	WR	Up	Slow	None	--	No	No	Absolute 24
58	Reg	W1	Up	Slow	None	--	No	No	Absolute 24
179	Ext	SR	Up	Slow	TxTy	Trg	No	No	Absolute 24
160	Ext	S1	Up	Slow	TxTy	Trg	No	No	Absolute 24
93	Reg	WR	Up	Slow	TxTy	Trg	No	No	Absolute 24
59	Reg	W1	Up	Slow	TxTy	Trg	No	No	Absolute 24
176	Ext	SR	Up	Slow	None	--	No	No	Abs Shortest Lower Texture
158	Ext	S1	Up	Slow	None	--	No	No	Abs Shortest Lower Texture
96	Reg	WR	Up	Slow	None	--	No	No	Abs Shortest Lower Texture
30	Reg	W1	Up	Slow	None	--	No	No	Abs Shortest Lower Texture
178	Ext	SR	Up	Slow	None	--	No	No	Absolute 512
140	Reg	S1	Up	Slow	None	--	No	No	Absolute 512
147	Ext	WR	Up	Slow	None	--	No	No	Absolute 512
142	Ext	W1	Up	Slow	None	--	No	No	Absolute 512
190	Ext	SR	--	----	TxTy	Trg	No	No	None
189	Ext	S1	--	----	TxTy	Trg	No	No	None
154	Ext	WR	--	----	TxTy	Trg	No	No	None
153	Ext	W1	--	----	TxTy	Trg	No	No	None
78	Ext	SR	--	----	TxTy	Num	No	No	None
241	Ext	S1	--	----	TxTy	Num	No	No	None
240	Ext	WR	--	----	TxTy	Num	No	No	None
239	Ext	W1	--	----	TxTy	Num	No	No	None

The following tables show the possibilities for generalized floor linedef type parameters. Any combination of parameters is allowed:

Slow and Fast represent the same speeds as slow and fast regular floors. Normal is twice as fast as slow, Fast is twice normal, Turbo is twice Fast.

Generalized floor types

#	Class	Trig	Dir	Spd	Chg¹	Mdl²	Mon	Crsh	Target
6000H-7FFFH	Gen	P1/PR	Up	Slow	None	Trg	Yes	Yes	Lowest Neighbor Floor
		S1/SR	Dn	Normal	Tx	Num	No	No	Next Neighbor Floor
		W1/WR		Fast	Tx0				Lowest Neighbor Ceiling
		G1/GR		Turbo	TxTy				Highest Neighbor Floor
									Ceiling
									24
									32
									Shortest Lower Texture

1. Chg - Mon(ster) enabled must be No if Chg field is not None
   • Tx = Texture copied only
   • Tx0 = Texture copied and Type->0
   • TxTy = Texture and Type copied
2. Mdl
   • Trg = Trigger Model
   • Num = Numeric Model

Ceilings

Ceiling targets

Highest Neighbor Ceiling (HnC)

This means that the ceiling moves to the height of the highest neighboring ceiling NOT including the ceiling itself. If the ceiling direction is down (only possible with generalized ceilings) motion is instant, else at the ceiling's speed. If no adjacent ceiling exists the ceiling moves to -32000 units.

Next Neighbor Ceiling (NnC)

This means that the ceiling moves up to the height of the lowest adjacent ceiling greater in height than the current, or to the height of the highest adjacent ceiling less in height than the current, as determined by the ceiling's direction. Instant motion is not possible in this case. If no such ceiling exists, the ceiling does not move.

Lowest Neighbor Ceiling (LnC)

This means that the ceiling height changes to the height of the lowest ceiling possessed by any neighboring sector, NOT including itself. If the target height is in the opposite direction to ceiling motion, motion is instant, otherwise at the ceiling action's speed. If no adjacent ceiling exists the ceiling moves to 32000 units.

Highest Neighbor Floor (HnF)

This means that the ceiling height changes to the height of the highest neighboring floor, excluding the ceiling's floor itself. If no neighbor floor exists, the ceiling moves down to -32000 or the ceiling's floor, whichever is higher. If the target height is in the opposite direction to ceiling motion, the motion is instant, otherwise it occurs at the ceiling action's speed.

Floor

The ceiling moves down until its at floor height, instantly if ceiling direction is up (only available with generalized types), at the ceiling speed if the direction is down.

8 Above Floor (8aF)

This means that the ceiling height changes to 8 above the height of the ceiling's floor. If the target height is in the opposite direction to ceiling motion, the motion is instant, otherwise it occurs at the ceiling action's speed.

24 Units (24)

The ceiling moves 24 units in the ceiling action's direction. Instant motion is not possible with this linedef type.

32 Units (32)

The ceiling moves 32 units in the ceiling action's direction. Instant motion is not possible with this linedef type.

Shortest Upper Texture (SUT)

The ceiling moves the height of the shortest upper texture on the boundary of the sector, in the ceiling direction. Instant motion is not possible with this type. In the case that there is no surrounding texture the motion is to -32000 or +32000 depending on direction.

Varieties of ceilings

A ceiling can be activated by pushing on a linedef bounding it (generalized types only), or by pushing on a switch with the same tag as the ceiling sector, or by walking over a linedef with the same tag as the ceiling, or by shooting a linedef with the same tag as the ceiling with an impact weapon (generalized types only).

A ceiling can move either Up or Down.

A ceiling can move with speeds of Slow, Normal, Fast, or Turbo. If the target height specified by the ceiling function (see Ceiling Targets above) is in the opposite direction to the ceiling's motion, then travel is instantaneous, otherwise its at the speed specified.

A ceiling action can be a texture change type, in which case after the action the ceiling texture of the affected ceiling, and possibly the sector type of the affected ceiling are changed to those of a model sector. The sector type may be zeroed instead of copied from the model, or not changed at all. These change types are referred to below as Tx (texture only), Tx0 (type set to 0), and TxTy (texture and type copied from model). The model sector for the change may be the sector on the first sidedef of the trigger (trigger model) or the sector with ceiling at destination height across the lowest numbered two-sided linedef surrounding the affected sector (numeric model). If no model sector exists, no change occurs. If a change occurs, ceiling texture is always affected, lighting is never affected, even that corresponding to the sector's type, nor is any other sector property other than the sector's type.

Numeric model algorithm:

1. Find all ceilings adjacent to the tagged ceiling at destination height
2. Find the lowest numbered linedef separating those ceilings from that tagged
3. The sector on the other side of that linedef is the model

A ceiling action can have the crush property (generalized types only), in which case players and monsters are crushed when the ceiling tries to move below the point where they fit exactly underneath the ceiling. This means they take damage until they die, leave the sector, or the ceiling action is stopped. A ceiling action never reverses on encountering an obstacle, even if the crush property is not true, the ceiling merely remains in the same position until the obstacle is removed or dies, then continues.

Ceiling linedef types

Regular and extended ceiling types

#	Class	Trig	Dir	Spd	Chg¹	Mdl²	Mon	Crsh	Target
43	Reg	SR	Dn	Fast	None	--	No	No	Floor
41	Reg	S1	Dn	Fast	None	--	No	No	Floor
152	Ext	WR	Dn	Fast	None	--	No	No	Floor
145	Ext	W1	Dn	Fast	None	--	No	No	Floor
186	Ext	SR	Up	Slow	None	--	No	No	Highest Neighbor Ceiling
166	Ext	S1	Up	Slow	None	--	No	No	Highest Neighbor Ceiling
151	Ext	WR	Up	Slow	None	--	No	No	Highest Neighbor Ceiling
40	Reg	W1	Up	Slow	None	--	No	No	Highest Neighbor Ceiling
187	Ext	SR	Dn	Slow	None	--	No	No	8 Above Floor
167	Ext	S1	Dn	Slow	None	--	No	No	8 Above Floor
72	Reg	WR	Dn	Slow	None	--	No	No	8 Above Floor
44	Reg	W1	Dn	Slow	None	--	No	No	8 Above Floor
205	Ext	SR	Dn	Slow	None	--	No	No	Lowest Neighbor Ceiling
203	Ext	S1	Dn	Slow	None	--	No	No	Lowest Neighbor Ceiling
201	Ext	WR	Dn	Slow	None	--	No	No	Lowest Neighbor Ceiling
199	Ext	W1	Dn	Slow	None	--	No	No	Lowest Neighbor Ceiling
206	Ext	SR	Dn	Slow	None	--	No	No	Highest Neighbor Floor
204	Ext	S1	Dn	Slow	None	--	No	No	Highest Neighbor Floor
202	Ext	WR	Dn	Slow	None	--	No	No	Highest Neighbor Floor
200	Ext	W1	Dn	Slow	None	--	No	No	Highest Neighbor Floor

Generalized ceiling types

#	Class	Trig	Dir	Spd	Chg¹	Mdl²	Mon	Crsh	Target
4000H-5FFFH	Gen	P1/PR	Up	Slow	None	Trg	Yes	Yes	Highest Neighbor Ceiling
		S1/SR	Dn	Normal	Tx	Num	No	No	Next Neighbor Ceiling
		W1/WR		Fast	Tx0				Lowest Neighbor Ceiling
		G1/GR		Turbo	TxTy				Highest Neighbor Floor
									Floor
									24
									32
									Shortest Upper Texture

1. Chg - Mon(ster) enabled must be No if Chg field is not None
   • Tx = Texture copied only
   • Tx0 = Texture copied and Type->0
   • TxTy = Texture and Type copied
2. Mdl
   • Trg = Trigger Model
   • Num = Numeric Model

Platforms (lifts)

A platform is basically a floor action involving two heights. The simple raise platform actions, for example, differ from the corresponding floor actions in that if they encounter an obstacle, they reverse direction and return to their former height.

The most often used kind of platform is a lift which travels from its current height to the target height, then waits a specified time and returns to it former height.

Platform targets

Lowest Neighbor Floor

This means that the platforms "low" height is the height of the lowest surrounding floor, including the platform itself. The "high" height is the original height of the floor.

Next Lowest Neighbor Floor

This means that the platforms "low" height is the height of the highest surrounding floor lower than the floor itself. If no lower floor exists, no motion occurs as the "low" and "high" heights are then both equal to the floors current height.

Lowest Neighbor Ceiling

This means that the platforms "low" height is the height of the lowest surrounding ceiling unless this is higher than the floor itself. If no adjacent ceiling exists, or is higher than the floor no motion occurs as the "low" and "high" heights are then both equal to the floors current height.

Lowest and Highest Floor

This target sets the "low" height to the lowest neighboring floor, including the floor itself, and the "high" height to the highest neighboring floor, including the floor itself. When this target is used the floor moves perpetually between the two heights. Once triggered this type of linedef runs permanently, even if the motion is temporarily suspended with a Stop type. No other floor action can be commanded on the sector after this type is begun.

Ceiling

This target sets the "high" height to the ceiling of the sector and the "low" height to the floor height of the sector and is only used in the instant toggle type that switches the floor between the ceiling and its original height on each activation. This is also the ONLY instant platform type.

Raise Next Floor

This means that the "high" height is the lowest surrounding floor higher than the platform. If no higher adjacent floor exists no motion will occur.

Raise 24 Units

The "low" height is the original floor height, the "high" height is 24 more.

Raise 32 Units

The "low" height is the original floor height, the "high" height is 32 more.

Varieties of platforms

A platform can be activated by pushing on a linedef bounding it (generalized types only), or by pushing on a switch with the same tag as the platform sector, or by walking over a linedef with the same tag as the platform, or by shooting a linedef with the same tag as the platform with an impact weapon.

A platform can move with speeds of Slow, Normal, Fast, or Turbo. Only the instant toggle platform moves instantly, all others move at the platform's speed.

A platform can have a delay, in between when it reaches "high" height and returns to "low" height, or at both ends of the motion in the case of perpetual lifts.

A platform action can be a texture change type, in which case after the action the floor texture of the affected floor, and possibly the sector type of the affected floor are changed to those of a model sector. The sector type may be zeroed instead of copied from the model, or not changed at all. These change types are referred to below as Tx (texture only), Tx0 (type zeroed), and TxTy (texture and type changed). The model sector for the change is always the sector on the first sidedef of the trigger (trigger model). If a change occurs, floor texture is always affected, lighting is never affected, even that corresponding to the sector's type, nor is any other sector property other than the sector's type.

Platform linedef types

Regular and extended platform types

#	Class	Trig	Dly	Spd	Chg	Mdl	Mon	Target
66	Reg	SR	--	Slow	Tx	Trg	No	Raise 24 Units
15	Reg	S1	--	Slow	Tx	Trg	No	Raise 24 Units
148	Ext	WR	--	Slow	Tx	Trg	No	Raise 24 Units
143	Ext	W1	--	Slow	Tx	Trg	No	Raise 24 Units
67	Reg	SR	--	Slow	Tx0	Trg	No	Raise 32 Units
14	Reg	S1	--	Slow	Tx0	Trg	No	Raise 32 Units
149	Ext	WR	--	Slow	Tx0	Trg	No	Raise 32 Units
144	Ext	W1	--	Slow	Tx0	Trg	No	Raise 32 Units
68	Reg	SR	--	Slow	Tx0	Trg	No	Raise Next Floor
20	Reg	S1	--	Slow	Tx0	Trg	No	Raise Next Floor
95	Reg	WR	--	Slow	Tx0	Trg	No	Raise Next Floor
22	Reg	W1	--	Slow	Tx0	Trg	No	Raise Next Floor
47	Reg	G1	--	Slow	Tx0	Trg	No	Raise Next Floor
181	Ext	SR	3s	Slow	None	--	No	Lowest and Highest Floor (perpetual)
162	Ext	S1	3s	Slow	None	--	No	Lowest and Highest Floor (perpetual)
87	Reg	WR	3s	Slow	None	--	No	Lowest and Highest Floor (perpetual)
53	Reg	W1	3s	Slow	None	--	No	Lowest and Highest Floor (perpetual)
182	Ext	SR	--	----	----	--	--	Stop
163	Ext	S1	--	----	----	--	--	Stop
89	Reg	WR	--	----	----	--	--	Stop
54	Reg	W1	--	----	----	--	--	Stop
62	Reg	SR	3s	Slow	None	--	No	Lowest Neighbor Floor (lift)
21	Reg	S1	3s	Slow	None	--	No	Lowest Neighbor Floor (lift)
88	Reg	WR	3s	Slow	None	--	Yes	Lowest Neighbor Floor (lift)
10	Reg	W1	3s	Slow	None	--	Yes	Lowest Neighbor Floor (lift)
123	Reg	SR	3s	Fast	None	--	No	Lowest Neighbor Floor (lift)
122	Reg	S1	3s	Fast	None	--	No	Lowest Neighbor Floor (lift)
120	Reg	WR	3s	Fast	None	--	No	Lowest Neighbor Floor (lift)
121	Reg	W1	3s	Fast	None	--	No	Lowest Neighbor Floor (lift)
211	Ext	SR	--	Inst	None	--	No	Ceiling (toggle)
212	Ext	WR	--	Inst	None	--	No	Ceiling (toggle)

Generalized platform types

#	Class	Trig	Dly	Spd	Mon	Target
3400H-37FFH	Gen	P1/PR	1s	Slow	Yes	Lowest Neighbor Floor
		S1/SR	3s	Normal	No	Next Lowest Neighbor Floor
		W1/WR	5s	Fast		Lowest Neighbor Ceiling
		G1/GR	10s	Turbo		Lowest and Highest Floor (perpetual)

Crusher ceilings

A crusher ceiling is a linedef type that causes the ceiling to cycle between its starting height and 8 above the floor, damaging monsters and players that happen to be in-between. Barrels explode when crushed.

Once a crusher ceiling is started it remains running for the remainder of the level even if temporarily suspended with a stop type. No other ceiling action can be used in that sector thereafter.

Varieties of crushers

A crusher can be activated by pushing on a linedef bounding it (generalized types only), or by pushing on a switch with the same tag as the crusher sector, or by walking over a linedef with the same tag as the crusher, or by shooting a linedef with the same tag as the crusher with an impact weapon (generalized types only).

A crusher has a speed: slow, normal, fast, or turbo. The slower the speed, the more damage the crusher does when crushing, simply through being applied longer. When a slow or normal crusher is moving down and encounters something to crush, it slows down even more, by a factor of 8. This persists until it reaches bottom of its stroke and starts upward again. Fast and turbo crushers do not slow down.

A crusher can be silent. The regular silent crusher makes platform stop and start noises at the top and bottom of its stroke. The generalized silent crusher is completely quiet.

A crusher linedef is provided to stop a crusher in its current position. Care should be taken that this does not lock the player out of an area of the level if the crusher is too low to pass under. A crusher can be restarted, but not changed, with any crusher-start linedef.

Crusher linedef types

Regular and extended crusher types

#	Class	Trig	Spd	Mon	Silent	Action
184	Ext	SR	Slow	No	No	Start
49	Reg	S1	Slow	No	No	Start
73	Reg	WR	Slow	No	No	Start
25	Reg	W1	Slow	No	No	Start
183	Ext	SR	Fast	No	No	Start
164	Ext	S1	Fast	No	No	Start
77	Reg	WR	Fast	No	No	Start
6	Reg	W1	Fast	No	No	Start
185	Ext	SR	Slow	No	Yes	Start
165	Ext	S1	Slow	No	Yes	Start
150	Ext	WR	Slow	No	Yes	Start
141	Reg	W1	Slow	No	Yes	Start
188	Ext	SR	----	--	--	Stop
168	Ext	S1	----	--	--	Stop
74	Reg	WR	----	--	--	Stop
57	Reg	W1	----	--	--	Stop

Generalized crusher types

#	Class	Trig	Spd	Mon	Silent
2F80H-2FFFH	Gen	P1/PR	Slow	Yes	Yes
		S1/SR	Normal	No	No
		W1/WR	Fast
		G1/GR	Turbo

Stair builders

A stair builder is a linedef type that sets a sequence of sectors defined by a complex rule to an ascending or descending sequence of heights.

The rule for stair building is as follows:

1. The first step to rise or fall is the tagged sector. It rises or falls by the stair stepsize, at the stair speed, in the stair direction.
2. To find the next step (sector) affected examine each two-sided linedef with first sidedef facing into the previous step in numerical order. For each such linedef if the sector on the other side is already active, or has already risen from this stair, the linedef is skipped. If textures are not ignored then any linedef with a different floor texture on its second side is also skipped. The next step to rise is the sector on the other side of the first linedef not skipped. If none exists, stair building ceases.

   The next step moves to the height of the previous step plus or minus the stepsize depending on the direction the stairs build, up or down. If the motion is in the same direction as the stairs build, it occurs at stair build speed, otherwise it is instant.

3. Repeat step 2 until stair building ceases.

Varieties of stair builders

A stair can be activated by pushing on a linedef bounding it (generalized types only), or by pushing on a switch with the same tag as the stair sector, or by walking over a linedef with the same tag as the stair, or by shooting a linedef with the same tag as the stair with an impact weapon (generalized types only).

Only extended and generalized stair types are retriggerable. The extended retriggerable stairs are mostly useless, though triggering a stair with stepsize 8 twice might be used. The generalized retriggerable stairs alternate building up and down on each activation which is much more useful.

A stair can build up or down (generalized types only).

A stair can have a step size of 4, 8, 16, or 24. Only generalized types support stepsize of 4 or 24.

A stair can have build speeds of slow, normal, fast or turbo. Only generalized types support speeds of normal or turbo.

A stair can stop on encountering a different texture or ignore (generalized types only) different textures and continue.

Only the regular build fast, stepsize 16 stair has the property that monsters and players can be crushed by the motion, all others do not crush.

Stair builder linedef types

Regular and extended stairs types

#	Class	Trig	Dir	Spd	Step	Ignore	Mon
258	Ext	SR	Up	Slow	8	No	No
7	Reg	S1	Up	Slow	8	No	No
256	Ext	WR	Up	Slow	8	No	No
8	Reg	W1	Up	Slow	8	No	No
259	Ext	SR	Up	Fast	16	No	No
127	Reg	S1	Up	Fast	16	No	No
257	Ext	WR	Up	Fast	16	No	No
100	Reg	W1	Up	Fast	16	No	No

Generalized stairs types

#	Class	Trig	Dir	Spd	Step	Ignore	Mon
3000H-33FFH	Gen	P1/PR	Up	Slow	4	Yes	Yes
		S1/SR	Dn	Normal	8	No	No
		W1/WR		Fast	16
		G1/GR		Turbo	24

Elevators

An elevator is a linedef type that moves both floor and ceiling together. All elevator linedefs are extended, there are no regular or generalized elevator types. Instant elevator motion is not possible, and monsters cannot activate elevators. All elevator triggers are either switched or walkover.

Elevator targets

Next Highest Floor

The elevator floor moves to the lowest adjacent floor higher than the elevator's floor, the ceiling staying the same height above the floor. If there is no higher floor the elevator does not move.

Next Lowest Floor

The elevator floor moves to the highest adjacent floor lower than the current floor, the ceiling staying the same height above the floor. If there is no lower floor the elevator does not move.

Current Floor

The elevator floor moves to the height of the floor on the first sidedef of the triggering line, the ceiling remaining the same height above the elevator floor.

Elevator linedef types

Extended elevator types

#	Class	Trig	Spd	Target
230	Ext	SR	Fast	Next Highest Floor
229	Ext	S1	Fast	Next Highest Floor
228	Ext	WR	Fast	Next Highest Floor
227	Ext	W1	Fast	Next Highest Floor
234	Ext	SR	Fast	Next Lowest Floor
233	Ext	S1	Fast	Next Lowest Floor
232	Ext	WR	Fast	Next Lowest Floor
231	Ext	W1	Fast	Next Lowest Floor
238	Ext	SR	Fast	Current Floor
237	Ext	S1	Fast	Current Floor
236	Ext	WR	Fast	Current Floor
235	Ext	W1	Fast	Current Floor

Lighting

The lighting linedef types change the lighting in the tagged sector. All are regular or extended types, there are no generalized lighting types. All are switched or walkovers.

Lighting targets

Lights to Minimum Neighbor

Each tagged sector is set to the minimum light level found in any adjacent sector. The tagged sectors are changed in numerical order, and this may influence the result.

Lights to Maximum Neighbor

Each tagged sector is set to the maximum light level found in any adjacent sector. The tagged sectors are changed in numerical order, and this may influence the result.

Blinking

Each tagged sector begins blinking between two light levels. The brighter level is the light level in the tagged sector. The darker level is the minimum neighbor light level, or 0 if all neighbor sectors have lighting greater than or equal to the sector's at the time of activation. The blinking is non-synchronous, beginning 1–9 gametics after activation, with a dark period of 1 sec (35 gametics) and a bright period of 1/7 sec (5 gametics).

35 Units

Each tagged sector is set to a light level of 35 units.

255 Units

Each tagged sector is set to a light level of 255 units.

Lighting linedef types

Regular and extended lighting types

#	Class	Trig	Target
139	Reg	SR	35 Units
170	Ext	S1	35 Units
79	Reg	WR	35 Units
35	Reg	W1	35 Units
138	Reg	SR	255 Units
171	Ext	S1	255 Units
81	Reg	WR	255 Units
13	Reg	W1	255 Units
192	Ext	SR	Maximum Neighbor
169	Ext	S1	Maximum Neighbor
80	Reg	WR	Maximum Neighbor
12	Reg	W1	Maximum Neighbor
194	Ext	SR	Minimum Neighbor
173	Ext	S1	Minimum Neighbor
157	Ext	WR	Minimum Neighbor
104	Reg	W1	Minimum Neighbor
193	Ext	SR	Blinking
172	Ext	S1	Blinking
156	Ext	WR	Blinking
17	Reg	W1	Blinking

Exits

An exit linedef type ends the current level, bringing up the intermission screen with its report of kills/items/secrets (or frags in the case of deathmatch). Obviously, none are retriggerable, and none require tags, since no sector is affected.

Exit varieties

An exit can be activated by pushing on a switch with the exit type or by walking over a linedef with the exit type, or by shooting a linedef with the exit type with an impact weapon.

An exit can be normal or secret. The normal exit simply ends the level and takes the player to the next level via the intermission screen. The secret exit only works on certain levels depending on the IWAD being played:

• In Doom/Ultimate Doom, a secret exit on any level leads to the secret level for that episode, but a normal exit on that level always returns the player to the "next" level (E1M4, E2M6, E3M7, or E4M3 respectively). This can be exploited as a special effect in PWADs, causing the player to skip or repeat levels.
• In Doom II, a secret exit can lead from MAP15 to MAP31 or from MAP31 to MAP32. If a secret exit is used in any other level, it instead resets the current level, unless the player entered the current level via -warp or idclev, in which case they are taken to MAP01. A normal exit from MAP31 or MAP32 goes to MAP16.

Exit linedef types

Regular and extended exit types

#	Class	Trig	Type
11	Reg	S1	Normal
52	Reg	W1	Normal
197	Ext	G1	Normal
51	Reg	S1	Secret
124	Reg	W1	Secret
198	Ext	G1	Secret

Teleporters

A teleporter is a linedef that when crossed or switched makes the player or monster appear elsewhere in the level. There are only regular and extended teleporters, no generalized teleporters exist. Teleporters are the only direction sensitive walkover triggers in Doom (to allow them to be exited without teleporting again). They must be crossed from the first sidedef side in order to work.

The place that the player or monster appears is set in one of two ways. The more common is by a teleport thing in the sector tagged to the teleport line. The newer completely player preserving line-line silent teleport makes the player appear relative to the exit line (identified by having the same tag as the entry line) with the same orientation, position, momentum and height that they had relative to the entry line just before teleportation. A special kind of line-line teleporter is also provided that reverses the player's orientation by 180 degrees.

In the case of several lines tagged the same as the teleport line, or several sectors tagged the same, or several teleport things in the tagged sector, in all cases the lowest numbered one is used.

In Doom crossing a W1 teleport line in the wrong direction used it up, and it was never activatable. In Boom this is not the case, it does not teleport but remains active until next crossed in the right direction.

If the exit of a teleporter is blocked a monster (or anything besides a player) will not teleport through it. However, a player will teleport, including into a down crusher, a monster, or another player. In the latter two cases the monster/player occupying the spot dies messily, and this is called a telefrag. On MAP30, monsters can and will telefrag other monsters or players.

Teleporter varieties

A teleporter can be walkover or switched, and retriggerable or not.

A teleporter can have destination set by a teleport thing in the tagged sector, or by a line tagged the same as the teleport line. These are called thing teleporters and line teleporters respectively.

A teleporter can preserve orientation or set orientation from the position, height, and angle of the teleport thing. Note a thing destination teleporter always sets position, though it may preserve orientation otherwise.

A teleporter can produce green fog and a whoosh noise, or it can be silent, in which case it does neither.

A teleporter can transport monsters only, or both players and monsters.

Teleporter linedef types

Regular and extended teleporter types

#	Class	Trig	Silent	Mon	Plyr	Orient	Dest
195	Ext	SR	No	Yes	Yes	Set	TP thing in tagged sector
174	Ext	S1	No	Yes	Yes	Set	TP thing in tagged sector
97	Reg	WR	No	Yes	Yes	Set	TP thing in tagged sector
39	Reg	W1	No	Yes	Yes	Set	TP thing in tagged sector
126	Reg	WR	No	Yes	No	Set	TP thing in tagged sector
125	Reg	W1	No	Yes	No	Set	TP thing in tagged sector
269	Ext	WR	Yes	Yes	No	Set	TP thing in tagged sector
268	Ext	W1	Yes	Yes	No	Set	TP thing in tagged sector
210	Ext	SR	Yes	Yes	Yes	Preserve	TP thing in tagged sector
209	Ext	S1	Yes	Yes	Yes	Preserve	TP thing in tagged sector
208	Ext	WR	Yes	Yes	Yes	Preserve	TP thing in tagged sector
207	Ext	W1	Yes	Yes	Yes	Preserve	TP thing in tagged sector
244	Ext	WR	Yes	Yes	Yes	Preserve	Line with same tag
243	Ext	W1	Yes	Yes	Yes	Preserve	Line with same tag
263	Ext	WR	Yes	Yes	Yes	Preserve	Line with same tag (reversed)
262	Ext	W1	Yes	Yes	Yes	Preserve	Line with same tag (reversed)
267	Ext	WR	Yes	Yes	No	Preserve	Line with same tag
266	Ext	W1	Yes	Yes	No	Preserve	Line with same tag
265	Ext	WR	Yes	Yes	No	Preserve	Line with same tag (reversed)
264	Ext	W1	Yes	Yes	No	Preserve	Line with same tag (reversed)

Donuts

A donut is a very specialized linedef type that lowers a pillar in a surrounding pool, while raising the pool and changing its texture and type.

The tagged sector is the pillar, and its lowest numbered line must be two-sided. The sector on the other side of that is the pool. The pool must have a two-sided line whose second sidedef does not adjoin the pillar, and the sector on the second side of the lowest numbered such linedef is the model for the pool's texture change. The model sector floor also provides the destination height both for lowering the pillar and raising the pool.

No generalized donut linedefs exist, and all are switched or walkover.

Donut linedef types

Regular and extended donut types

#	Class	Trig
191	Ext	SR
9	Reg	S1
155	Ext	WR
146	Ext	W1

Property transfer

These linedefs are special purpose and are used to transfer properties from the linedef itself or the sector on its first sidedef to the tagged sector(s). None are triggered, they simply exist.

Extended property transfer linedefs

213 Ext - Set Tagged Floor Lighting to Lighting on 1st Sidedef's Sector

Used to give the floor of a sector a different light level from the remainder of the sector. For example bright lava in a dark room.

261 Ext - Set Tagged Ceiling Lighting to Lighting on 1st Sidedef's Sector

Used to give the ceiling of a sector a different light level from the remainder of the sector.

260 Ext - Make Tagged Lines (or this line if tag==0) Translucent

Used to make 2s normal textures translucent. If tag==0, then this linedef's normal texture is made translucent if it is 2s, and the default translucency map TRANMAP is used as the filter. If tag!=0, then all similarly-tagged 2s linedefs' normal textures are made translucent, and if this linedef's first sidedef contains a valid lump name for its middle texture (as opposed to a texture name), and the lump is 64K long, then that lump will be used as the translucency filter instead of the default TRANMAP, allowing different filters to be used in different parts of the same maps. If the first side's normal texture is not a valid translucency filter lump name, it must be a valid texture name, and will be displayed as such on this linedef.

242 Ext - Set Tagged Lighting, Flats Heights to 1st Sidedef's Sector, and set colormap based on sidedef textures.

The 242 linedef type makes sectors in game "look" different than how their physical proportions really are by copying the sector height values from another sector. This action allows the tagged sector to have two levels—an actual floor and ceiling, and another floor or ceiling where more flats are rendered. Things will stand on the actual floor or hang from the actual ceiling, while this function provides another rendered floor and ceiling at the heights of the sector on the first sidedef of the linedef. Typical use is "deep water" that can be over the player's head.

    ----------------------------------  < real sector's ceiling height
   |         real ceiling             | < control sector's ceiling texture
   |                                  |
   |                                  | < control sector's lightlevel
   |              A                   |
   |                                  | < upper texture as colormap
   |                                  |
   |                                  | < control sector's floor texture
    ----------------------------------  < control sector's ceiling height
   |         fake ceiling             | < real sector's ceiling texture
   |                                  |
   |                                  | < real sector's lightlevel
   |              B                   |
   |                                  | < normal texture as colormap
   |                                  |
   |          fake floor              | < real sector's floor texture
    ----------------------------------  < control sector's floor height
   |                                  | < control sector's ceiling texture
   |                                  |
   |                                  | < control sector's lightlevel
   |              C                   |
   |                                  | < lower texture as colormap
   |                                  |
   |          real floor              | < control sector's floor texture
    ----------------------------------  < real sector's floor height

Boom sectors controlled by a 242 linedef are partitioned into 3 spaces. The viewer's xyz coordinates uniquely determine which space they are in.

If they are in space B (normal space), then the floor and ceiling textures and lightlevel from the real sector are used, and the colormap from the 242 linedef's first sidedef's normal texture is used (COLORMAP is used if it is invalid or missing). The floor and ceiling are rendered at the control sector's heights.

If they are in space C ("underwater"), then the floor and ceiling textures and lightlevel from the control sector are used, and the lower texture in the 242 linedef's first sidedef is used as the colormap.

If they are in space A ("head over ceiling"), then the floor and ceiling textures and lightlevel from the control sector are used, and the upper texture in the 242 linedef's first sidedef is used as the colormap.

If only two of these adjacent partitions in z-space are used, such as underwater and normal space, one has complete control over floor textures, ceiling textures, light level, and colormaps, in each of the two partitions. The control sector determines the textures and lighting in the more "unusual" case (e.g. underwater).

It is also possible for the fake floor to extend below the real floor, in which case an invisible platform / stair effect is created. In that case, the picture looks like this (barring any ceiling effects too):

    ----------------------------------  < real sector's ceiling texture
   |   real ceiling = fake ceiling    |
   |                                  |
   |                                  |
   |              B                   | < real sector's lightlevel
   |                                  | < normal texture's colormap
   |                                  |
   |          real floor              |
    ----------------------------------  < invisible, no texture drawn
   |                                  |
   |                                  |
   |                                  | < real sector's lightlevel
   |              C                   | < normal texture's colormap
   |                                  |
   |                                  |
   |          fake floor              | < real sector's floor texture
    ----------------------------------  < fake sector's floor height

In this case, since the viewer is always at or above the fake floor, no colormap/lighting/texture changes occur—the fake floor just gets drawn at the control sector's height, but at the real sector's lighting and texture, while objects stand on the higher height of the real floor.

It is the viewer's position relative to the fake floor and/or fake ceiling which determines whether the control sector's lighting and textures should be used, and which colormap should be used. If the viewer is always between the fake floor and fake ceiling, then no colormap, lighting, or texture changes occur, and the view just sees the real sector's textures and light level drawn at possibly different heights.

If the viewer is below the fake floor height set by the control sector, or is above the fake ceiling height set by the control sector, then the corresponding colormap is used (lower or upper texture name), and the textures and lighting are taken from the control sector rather than the real sector. They are still stacked vertically in standard order—the control sector's ceiling is always drawn above the viewer, and the control sector's floor is always drawn below the viewer.

The kaleidescope effect only occurs when F_SKY1 is used as the control sector's floor or ceiling. If F_SKY1 is used as the control sector's ceiling texture, then under water, only the control sector's floor appears, but it "envelops" the viewer. Similarly, if F_SKY1 is used as the control sector's floor texture, then when the player's head is over a fake ceiling, the control sector's ceiling is used throughout.

F_SKY1 causes HOM when used as a fake ceiling between the viewer and normal space. Since there is no other good use for it, this kaleidescope is an option turned on by F_SKY1. Note that this does not preclude the use of sky REAL ceilings over deep water—this is the control sector's ceiling, the one displayed when the viewer is underwater, not the real one.

A colormap has the same size and format as Doom's COLORMAP. Extra colormaps may be defined in Boom by adding them between C_START and C_END markers in wads. Colormaps between C_START and C_END are automatically merged by Boom with any previously defined colormaps.

WATERMAP is a colormap predefined by Boom which can be used to provide a blue-green tint while the player is under water. WATERMAP can be modified by pwads.

Ceiling bleeding may occur if required upper textures are not used.

223 Ext - Length Sets Friction in tagged Sector, Sludge < 100, Ice > 100

The length of the linedef with type 223 controls the amount of friction experienced by the player in the tagged sector, when in contact with the floor. Lengths less than 100 are sticker than normal, lengths greater than 100 are slipperier than normal. The effect is only present in the tagged sector when its friction enable bit (bit 8) in the sector type is set. This allows the flat to be changed in conjunction with turning the effect on or off thru texture/type changes.

Constant pushers

Two types of constant pushers are available, wind and current. Depending on whether you are above, on, or below (special water sectors) the ground level, the amount of force varies.

The length of the linedef defines the 'full' magnitude of the force, and the linedef's angle defines the direction.

line type	above	on	under
wind (224)	full	half	none
current (225)	none	full	full

The linedef should be tagged to the sector where you want the effect. The special type of the sector should have bit 9 set (0x200). If this bit is turned off, the effect goes away. For example, a fan creating a wind could be turned off, and the wind dies, by changing the sector type and clearing that bit.

Constant pushers can be combined with scrolling effects and point pushers.

224 Ext - Length/Direction Sets Wind Force in tagged Sectors

225 Ext - Length/Direction Sets Current Force in tagged Sectors

Point pushers

Two types of point pushers are available, push and pull.

The previous implementation of these was SECTOR-SPECIFIC. The new implementation ignores sector boundaries and provides the effect in a circular area whose center is defined by a Thing of type 5001 (push) or 5002 (pull). You now also do not have to set any option flags on these Things. A new linedef type of 226 is used to control the effect, and this line should be tagged to the sector with the 5001/5002 Thing.

The length of the linedef defines the 'full' magnitude of the force, and the force is inversely proportional to distance from the point source. If the length of the controlling linedef is L, then the force is reduced to zero at a distance of 2L.

The angle of the controlling linedef is not used.

The sector where the 5001/5002 Things reside must have bit 9 set (0x200) in its type. If this is turned off, the effect goes away.

Point pushers can be combined with scrolling effects and constant pushers.

226 Ext - Length Sets Point Source Wind/Current Force in Tagged Sectors

Scrolling walls, flats, objects

Static scrollers

The most basic kind of scrolling linedef causes some part of the tagged sector or tagged wall to scroll, in proportion to the length of the linedef the trigger is on, and according to the direction that trigger linedef lies. For each 32 units of length of the trigger, the tagged object scrolls 1 unit per frame. Since the length of a linedef does not change during gameplay, these types are static, the scrolling effect remains constant during gameplay. However, these effects can be combined with, and/or canceled by, other scrollers.

250 - Scroll Tagged Ceiling

The ceiling of the tagged sector scrolls in the direction of the linedef trigger, 1 unit per frame for each 32 units of linedef trigger length. Objects attached to the ceiling do not move.

251 - Scroll Tagged Floor

The floor of the tagged sector scrolls in the direction of the linedef trigger, 1 unit per frame for each 32 units of linedef trigger length. Objects resting on the floor do not move.

252 - Carry Objects on Tagged Floor

Objects on the floor of the tagged sector move in the direction of the linedef trigger, 1 unit per frame for each 32 units of linedef trigger length. The floor itself does not scroll.

253 - Scroll Tagged Floor, Carry Objects

Both the floor of the tagged sector and objects resting on that floor move in the direction of the linedef trigger, 1 unit per frame for each 32 units of linedef trigger length.

254 - Scroll Tagged Wall, Same as Floor/Ceiling

Walls with the same tag as the linedef trigger scroll at the same rate as a floor or ceiling controlled by one of 250–253, allowing their motion to be synchronized. When the linedef trigger is not parallel to the wall, the component of the linedef in the direction perpendicular to the wall causes the wall to scroll vertically. The length of the component parallel to the wall sets the horizontal scroll rate, the length of the component perpendicular to the wall sets the vertical scroll rate.

Simple static scrollers

For convenience three simpler static scroll functions are provided for when a simple scrolling wall is needed without control over its rate or proportionality.

255 - Scroll Wall Using Sidedef Offsets

For simplicity, a static scroller is provided that scrolls the first sidedef of a linedef, based on its x- and y- offsets. No tag is used. The x offset controls the rate of horizontal scrolling, 1 unit per frame per x offset, and the y offset controls the rate of vertical scrolling, 1 unit per frame per y offset.

48 - Animated wall, Scrolls Left

A linedef with this type scrolls its first sidedef left at a constant rate of 1 unit per frame.

85 - Animated wall, Scrolls Right

A linedef with this type scrolls its first sidedef right at a constant rate of 1 unit per frame.

Dynamic scrolling

To achieve dynamic scrolling effects, the position or rate of scrolling is controlled by the relative position of the floor and ceiling of the sector on the scrolling trigger's first sidedef. The direction of scrolling remains controlled by the direction of the linedef trigger. Either the floor or ceiling may move in the controlling sector, or both. The control variable is the amount of change in the sum of the floor and ceiling heights.

All scroll effects are additive, and thus two or more effects may reinforce and/or cancel each other.

Displacement scrollers

In the first kind, displacement scrolling, the position of the scrolled objects or walls changes proportionally to the motion of the floor or ceiling in the sector on the first sidedef of the scrolling trigger. The proportionality is set by the length of the linedef trigger. If it is 32 units long, the wall, floor, ceiling, or object moves 1 unit for each unit the floor or ceiling of the controlling sector moves. If it is 64 long, they move 2 units per unit of relative floor/ceiling motion in the controlling sector and so on.

245 - Scroll Tagged Ceiling w.r.t. 1st Side's Sector

The tagged sector's ceiling texture scrolls in the direction of the scrolling trigger line, when the sector on the trigger's first sidedef changes height. The amount moved is the height change times the trigger length, divided by 32. Objects attached to the ceiling do not move.

246 - Scroll Tagged Floor w.r.t. 1st Side's Sector

The tagged sector's floor texture scrolls in the direction of the scrolling trigger line when the sector on the trigger's first sidedef changes height. The amount moved is the height change times the trigger length, divided by 32. Objects on the floor do not move.

247 - Push Objects on Tagged Floor w.r.t. 1st Side's Sector

Objects on the tagged sector's floor move in the direction of the scrolling trigger line when the sector on the trigger's first sidedef changes height. The amount moved is the height change times the trigger length, divided by 32.

248 - Push Objects & Tagged Floor w.r.t. 1st Side's Sector

The tagged sector's floor texture, and objects on the floor, move in the direction of the scrolling trigger line when the sector on the trigger's first sidedef changes height. The amount moved is the height change times the trigger length, divided by 32.

249 - Scroll Tagged Wall w.r.t. 1st Side's Sector

Walls with the same tag as the linedef trigger scroll at the same rate as a floor or ceiling controlled by one of 245–249, allowing their motion to be synchronized. When the linedef trigger is not parallel to the wall, the component of the linedef in the direction perpendicular to the wall causes the wall to scroll vertically. The length of the component parallel to the wall sets the horizontal scroll displacement, the length of the component perpendicular to the wall sets the vertical scroll displacement. The distance scrolled is the controlling sector's height change times the trigger length, divided by 32.

Accelerative scrollers

The second kind of dynamic scrollers, accelerative scrollers, also react to height changes in the sector on the first sidedef of the linedef trigger, but the RATE of scrolling changes, not the displacement. That is, changing the controlling sector's height speeds up or slows down the scrolling by the change in height times the trigger's length, divided by 32.

An on/off scroller can be made by using an accelerative scroller and any linedef that changes the controlling sector's heights. If a scroll effect which is initially on is desired, then the accelerative scroller should be combined with a static one which turns the scroll effect on initially. The accelerative scroller would then need to be set up to cancel the static scroller's effect when the controlling sector's height changes.

214 - Accel Tagged Ceiling w.r.t. 1st Side's Sector

The tagged sector's ceiling's rate of scroll changes in the direction of the trigger linedef (use vector addition if already scrolling) by the change in height of the sector on the trigger's first sidedef times the length of the linedef trigger, divided by 32. For example, if the ceiling is motionless originally, the linedef trigger is 32 long, and the ceiling of the controlling sector moves 1 unit, the tagged ceiling will start scrolling at 1 unit per frame.

215 - Accel Tagged Floor w.r.t. 1st Side's Sector

The tagged sector's floor's rate of scroll changes in the direction of the trigger linedef (use vector addition if already scrolling) by the change in height of the sector on the trigger's first sidedef times the length of the linedef trigger, divided by 32. For example, if the floor is motionless originally, the linedef trigger is 32 long, and the ceiling of the controlling sector moves 1 unit, the tagged floor will start scrolling at 1 unit per frame.

216 - Accel Objects on Tagged Floor w.r.t. 1st Side's Sector

Objects on the tagged sector's floor's rate of motion changes in the direction of the trigger linedef (use vector addition if already moving) by the change in height of the sector on the trigger's first sidedef times the length of the linedef trigger divided by 32. For example, if the objects are motionless originally, the linedef trigger is 32 long, and the ceiling of the controlling sector moves 1 unit, the objects on the tagged floor will start moving at 1 unit per frame.

217 - Accel Objects&Tagged Floor w.r.t. 1st Side's Sector

The tagged sector's floor, and objects on it, change its rate of motion in the direction of the trigger linedef (use vector addition if already moving) by the change in height of the sector on the trigger's first sidedef times the length of the linedef trigger, divided by 32. For example, if the floor and objects are motionless originally, the linedef trigger is 32 long, and the ceiling of the controlling sector moves 1 unit, the objects and the tagged floor will start moving at 1 unit per frame.

218 - Accel Tagged Wall w.r.t. 1st Side's Sector

Walls with the same tag as the linedef trigger increase their scroll rate in sync with a floor or ceiling controlled by one of 214–217. When the linedef trigger is not parallel to the wall, the component of the linedef in the direction perpendicular to the wall causes the wall to increase its vertical scroll rate. The length of the component parallel to the wall sets the change in horizontal scroll rate, the length of the component perpendicular to the wall sets the change in vertical scroll rate. The rate change is the height change times the trigger length, divided by 32.

Detailed generalized linedef specification

Boom has added generalized linedef types that permit the parameters of linedef actions to be nearly independently chosen. Instead of looking at the linedef special as one single number which corresponds to one single type, it is divided into entire ranges of effects where parts of the numbers are used as parameters.

Effect	Start of range	End of range	Size of range
Generalized crushers	12 160 (0x2f80)	12 287 (0x2fff)	128
Generalized stairs	12 288 (0x3000)	13 311 (0x33ff)	1024
Generalized lifts	13 312 (0x3400)	14 335 (0x37ff)	1024
Generalized locked doors	14 336 (0x3800)	15 359 (0x3bff)	1024
Generalized doors	15 360 (0x3c00)	16 383 (0x3fff)	1024
Generalized ceilings	16 384 (0x4000)	24 575 (0x5fff)	8192
Generalized floors	24 576 (0x6000)	32 767 (0x7fff)	8192
Total	12 160 (0x2f80)	32 767 (0x7fff)	20 608

The following sections define the placement and meaning of the bit fields within each linedef category. Fields in the description are listed in increasing numeric order.

Some nomenclature:

Target height designations:

H means highest, L means lowest, N means next, F means floor, C means ceiling, n means neighbor, Cr means crush, sT means shortest lower texture.

Texture change designations:

• c0n - change texture, change sector type to 0, numeric model change
• c0t - change texture, change sector type to 0, trigger model change
• cTn - change texture only, numeric model change
• cTt - change texture only, trigger model change
• cSn - change texture and sector type to model's, numeric model change
• cSt - change texture and sector type to model's, trigger model change

A trigger model change uses the sector on the first side of the trigger for its model. A numeric model change looks at the sectors adjoining the tagged sector at the target height, and chooses the one across the lowest numbered two sided line for its model. If no model exists, no change occurs. Note that in DOOM II v1.9, no model meant an illegal sector type was generated.

Generalized floors (8192 types)

field	description	NBits	Mask	Shift
trigger	W1/WR/S1/SR/G1/GR/P1/PR	3	0x0007	0
speed	slow/normal/fast/turbo	2	0x0018	3
model	trig/numeric -or- nomonst/monst	1	0x0020	5
direct	down/up	1	0x0040	6
target	HnF/LnF/NnF/LnC/C/sT/24/32	3	0x0380	7
change	nochg/zero/txtonly/type	2	0x0c00	10
crush	no/yes	1	0x1000	12

DETH Nomenclature:

W1[m] F->HnF DnS [c0t] [Cr]
WR[m] F->LnF DnN [c0n]
S1[m] F->NnF DnF [cTt]
SR[m] F->LnC DnT [cTn]
G1[m] F->C   UpS [cSt]
GR[m] FbysT  UpN [cSn]
D1[m] Fby24  UpF
DR[m] Fby32  UpT

Notes:

1. When change is nochg, model is 1 when monsters can activate trigger otherwise monsters cannot activate it.
2. The change fields mean the following:
   • nochg - means no texture change or type change
   • zero - means sector type is zeroed, texture copied from model
   • txtonly - means sector type unchanged, texture copied from model
   • type - means sector type and floor texture are copied from model
3. down/up specifies the "normal" direction for moving. If the target specifies motion in the opposite direction, motion is instant. Otherwise it occurs at speed specified by speed field.
4. Speed is 1/2/4/8 units per tic
5. If change is nonzero then model determines which sector is copied. If model is 0 its the sector on the first side of the trigger. If model is 1 (numeric) then the model sector is the sector at destination height on the opposite side of the lowest numbered two sided linedef around the tagged sector. If it does not exist no change occurs.

Generalized ceilings (8192 types)

field	description	NBits	Mask	Shift
trigger	W1/WR/S1/SR/G1/GR/P1/PR	3	0x0007	0
speed	slow/normal/fast/turbo	2	0x0018	3
model	trig/numeric -or- nomonst/monst	1	0x0020	5
direct	down/up	1	0x0040	6
target	HnC/LnC/NnC/HnF/F/sT/24/32	3	0x0380	7
change	nochg/zero/txtonly/type	2	0x0c00	10
crush	no/yes	1	0x1000	12

DETH Nomenclature:

W1[m] C->HnC DnS [Cr] [c0t]
WR[m] C->LnC DnN      [c0n]
S1[m] C->NnC DnF      [cTt]
SR[m] C->HnF DnT      [cTn]
G1[m] C->F   UpS      [cSt]
GR[m] CbysT  UpN      [cSn]
D1[m] Cby24  UpF
DR[m] Cby32  UpT

Notes:

1. When change is nochg, model is 1 when monsters can activate trigger otherwise monsters cannot activate it.
2. The change fields mean the following:
   • nochg - means no texture change or type change
   • zero - means sector type is zeroed, texture copied from model
   • txtonly - means sector type unchanged, texture copied from model
   • type - means sector type and ceiling texture are copied from model
3. down/up specifies the "normal" direction for moving. If the target specifies motion in the opposite direction, motion is instant. Otherwise it occurs at speed specified by speed field.
4. Speed is 1/2/4/8 units per tic
5. If change is nonzero then model determines which sector is copied. If model is 0 its the sector on the first side of the trigger. If model is 1 (numeric) then the model sector is the sector at destination height on the opposite side of the lowest numbered two sided linedef around the tagged sector. If it does not exist no change occurs.

Generalized doors (1024 types)

field	description	NBits	Mask	Shift
trigger	W1/WR/S1/SR/G1/GR/P1/PR	3	0x0007	0
speed	slow/normal/fast/turbo	2	0x0018	3
kind	odc/o/cdo/c	2	0x0060	5
monster	n/y	1	0x0080	7
delay	1/4/9/30 (secs)	2	0x0300	8

DETH Nomenclature:

W1[m] OpnD{1|4|9|30}Cls S
WR[m] Opn               N
S1[m] ClsD{1|4|9|30}Opn F
SR[m] Cls               T
G1[m]
GR[m]
D1[m]
DR[m]

Notes:

1. The odc (Open, Delay, Close) and cdo (Close, Delay, Open) kinds use the delay field. The o (Open and Stay) and c (Close and Stay) kinds do not.
2. The precise delay timings in gametics are: 35/150/300/1050
3. Speed is 2/4/8/16 units per tic

Generalized locked doors (1024 types)

field	description	NBits	Mask	Shift
trigger	W1/WR/S1/SR/G1/GR/P1/PR	3	0x0007	0
speed	slow/normal/fast/turbo	2	0x0018	3
kind	odc/o	1	0x0020	5
lock	any/rc/bc/yc/rs/bs/ys/all	3	0x01c0	6
sk=ck	n/y	1	0x0200	9

DETH Nomenclature:

W1[m] OpnDCls           S Any
WR[m] Opn               N R{C|S|K}
S1[m]                   F B{C|S|K}
SR[m]                   T Y{C|S|K}
G1[m]                     All{3|6}
GR[m]
D1[m]
DR[m]

Notes:

1. Delay for odc kind is constant at 150 gametics or about 4.333 secs
2. The lock field allows any key to open a door, or a specific key to open a door, or all keys to open a door.
3. If the sk=ck field is 0 (n) skull and cards are different keys, otherwise they are treated identically. Hence an "all" type door requires 3 keys if sk=ck is 1, and 6 keys if sk=ck is 0.
4. Speed is 2/4/8/16 units per tic

Generalized lifts (1024 types)

field	description	NBits	Mask	Shift
trigger	W1/WR/S1/SR/G1/GR/P1/PR	3	0x0007	0
speed	slow/normal/fast/turbo	2	0x0018	3
monster	n/y	1	0x0020	5
delay	1/3/5/10 (secs)	2	0x00c0	6
target	LnF/NnF/LnC/LnF<->HnF(perp.)	2	0x0300	8

DETH Nomenclature:

W1[m] Lft  F->LnFD{1|3|5|10}    S
WR[m]      F->NnFD{1|3|5|10}    N
S1[m]      F->LnCD{1|3|5|10}    F
SR[m]      HnF<->LnFD{1|3|5|10} T
G1[m]
GR[m]
D1[m]
DR[m]

Notes:

1. The precise delay timings in gametics are: 35/105/165/350
2. Speed is 1/2/4/8 units per tic
3. If the target specified is above starting floor height, or does not exist the lift does not move when triggered. NnF is Next Lowest Neighbor Floor.
4. Starting a perpetual lift between lowest and highest neighboring floors locks out all other floor actions on the sector, even if it is stopped with the non-extended stop perpetual floor function.

Generalized stairs (1024 types)

field	description	NBits	Mask	Shift
trigger	W1/WR/S1/SR/G1/GR/P1/PR	3	0x0007	0
speed	slow/normal/fast/turbo	2	0x0018	3
monster	n/y	1	0x0020	5
step	4/8/16/24	2	0x00c0	6
dir	dn/up	1	0x0100	8
igntxt	n/y	1	0x0200	9

DETH Nomenclature:

W1[m] Stair Dn s4  S [Ign]
WR[m]       Up s8  N
S1[m]          s16 F
SR[m]          s24 T
G1[m]
GR[m]
D1[m]
DR[m]

Notes:

1. Speed is .25/.5/2/4 units per tic
2. If igntxt is 1, then the staircase will not stop building when a step does not have the same texture as the previous.
3. A retriggerable stairs builds up and down alternately on each trigger.

Generalized crushers (128 types)

field	description	NBits	Mask	Shift
trigger	W1/WR/S1/SR/G1/GR/P1/PR	3	0x0007	0
speed	slow/normal/fast/turbo	2	0x0018	3
monster	n/y	1	0x0020	5
silent	n/y	1	0x0040	6

DETH Nomenclature:

W1[m] Crusher S [Silent]
WR[m]         N
S1[m]         F
SR[m]         T
G1[m]
GR[m]
D1[m]
DR[m]

Notes:

1. Speed is 1/2/4/8 units per second, faster means slower damage as usual.
2. If silent is 1, the crusher is totally quiet, no start/stop sounds.

Sources

• Line types at the EDGE editing guide
• Linedef type at the Eternity Engine wiki
• Doom Legacy editing guide