BTS What all typical rooms should have in common
In this page, you will learn what almost all rooms of the Portal's Behind the Scenes areas have in common.
Almost every single room in the BTS areas has at least one support beam. Rooms without support beams are some sewer rooms, areas with panels, areas with the test chamber metal wall texture and off-limit areas.
For more information, take a look at Support beams
Not all rooms have vents in them, although there is no limit to where you can place them.
You can learn how to create vents at Creating Vents
Fans have no limit to where they can be, although they aren't really used in really small areas.
You can learn how to create fans at Creating Fans
A staple feature of most bts areas are the cables hanging from the ceiling. In Portal 1, they are made using
keyframe_rope entities, with a single
move_rope always being the first in a system. Be sure to get creative with adjusting the slack.
These properties are required for ropes as seen in Portal.
There is one single cable in escape_00 that uses the
The official BTS maps have an env_fog_controller in them with the following properties:
|Primary Fog Color||58 82 101|
|Secondary Fog Color||85 43 0|
All official escape maps have a
color_correction. Create a
color_correction entity and enter the following properties:
|Lookup Falloff Start Distance||-1|
|Lookup Falloff End Distance||-1|
|Lookup Table Filename||scripts/colorcorrection/cc_bts.raw|
|Lookup Fade In Duration||2|
|Lookup Fade out Duration||2|
All escape maps have an
env_tonemap_controller and set its name to
logic_auto and give the
logic_auto the following outputs: