Fake floor

A fake floor is a map design technique where a sector forms a pit with no textures on its walls. This creates an illusionary floor above the height of the actual floor. Among other uses, this visual oddity can be implemented in a relatively deep pit to hide monsters which are raised to attack the player or in a shallower one to add a deep-water effect. Another usage of using this is creating floor that have different brightness than it's floor. The reason for this is because the floor (or ceiling) stops getting drawn only when it touches a textured wall, otherwise it "flows" out of its sector's bounds.



It is not encouraged to use with modern source ports that use 3D rendering, as the trick works only on Doom's original software rendering engine.

A notorious joke WAD called Wow uses this effect in a comical way, calling a fake-floor pit the player may fall into an illusio-pit.