E1M4: Hydroponic Facility (Double Impact)

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Double Impact maps
This level occupies the map slot E1M4. For other maps which occupy this slot, see Category:E1M4.
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E1M4: Hydroponic Facility is the fourth map of Double Impact. It was designed by Matt Cibulas (RottKing) and Ralph Vickers (Ralphis), and uses the music track "". The par time defined in the DMAPINFO lump of the edition released as official add-on is 7:00.


Map of Hydroponic Facility
Letters in italics refer to marked spots on the map. Sector, thing, and linedef numbers in boldface are secrets which count toward the end-of-level tally.


Other points of interest[edit]


  1. When you reach the large room on the north side of the map, look south and go through the vine. On the ledge here, look at the vine-covered wall on the east side with the silver ridges around it and open it. This secret room contains shotgun shells, rockets, a medikit, and a switch. (sector 129)
  2. In the room directly west of the yellow key room is a large lift. Ride it up, and find the computer terminal with the monitor on it. Open it up to find a rocket launcher, a medikit, and two rockets. (sector 191)
  3. In the nukage surrounding the yellow key area, press on the wall at the southeast corner for a lift, where you can collect a backpack and stimpacks. (sector 200)
  4. The switch in Secret #1 opens a door on ground level just south of where the switch is. Go through this door, making sure to pick up a radiation suit as you hop into the nukage going south. As you do, look for a brown wall. Open this wall and follow the passage to a secret room with numerous supplies and a teleporter. This teleporter takes you to the cage in the middle of the room with a soul sphere. (sector 221)
  5. Near the yellow door, find a gray wall that has some slime on it and open it to find a spectre (or two) guarding a medikit and a backpack. (sector 236)
  6. When you press the switch that reveals the yellow key, you also open up a monster closet behind you. You can open the central wall in this closet, revealing passages containing rockets, shotgun shells, health bonuses, and armor bonuses. (sector 296)
  7. Open the yellow door and climb the steps. At the top, go to the northeast corner and open the wall here for a stimpack and a switch. This switch opens the door in the previous room, the door that was south of the yellow door, allowing you to head outside and around. (sector 349)


Demo files[edit]

Areas / screenshots[edit]


Routes and tricks[edit]

Current records[edit]

The records for the map at the Doom Speed Demo Archive are:

Run Time Player Date File Notes
UV speed
NM speed
UV max 4:30.11 Boris Klimeš (dew) 2012-05-04 d1i4-430.zip
NM 100S
UV -fast
UV -respawn
UV Tyson
UV pacifist

The data was last verified in its entirety on December 9, 2021.


Player spawns[edit]

This level contains eleven spawn points:

  1. facing east. (thing 521)
  2. facing west. (thing 522)
  3. facing north. (thing 523)
  4. facing south. (thing 524)
  5. facing north. (thing 525)
  6. facing south. (thing 526)
  7. facing north. (thing 527)
  8. facing south-west. (thing 528)
  9. facing east. (thing 529)
  10. facing south-east. (thing 530)
  11. facing south. (thing 537)


Map data[edit]

Things 557
Vertices 1650*
Linedefs 1814
Sidedefs 2596
Sectors 395
* The vertex count without the effect of node building is 1385.


This level contains the following numbers of things per skill level:

Technical information[edit]

Inspiration and development[edit]


See also[edit]


External links[edit]