fog_volume

Code classes:

• CFogVolume
• CServerOnlyEntity
• CBaseEntity (all ents)

fog_volume is a brush entity present in all games since Left 4 Dead. It controls fog and other visual cinematic elements within its volume.

Tip: Typically when Valve uses this entity, they have a master version of their FX entities (use the Master flag) which is used for the outdoors effects, then only create fog_volumes for indoors areas.

Note: In , the origin of a player is not used to decide which volume they're in, but rather a point roughly 512 units above them. Due to this, the brush has to be extended far up above the level.

Note: The entity uses its bounding box to detect players, meaning the trigger will always be in a cuboid shape regardless of how the brush(es) look.

Keyvalues

Fog Name (FogName) <target_destination>

The name of the env_fog_controller to activate when this entity is touched.

Postprocess Name (PostProcessName) <target_destination>

The name of the postprocess_controller to activate when this entity is touched.

ColorCorrection Name (ColorCorrectionName) <target_destination>

The name of the color_correction to activate when this entity is touched.

Start Disabled (StartDisabled) <boolean>

Stay inactive until Enabled.

Inputs

Enable

Makes the entity active.

Disable

Makes the entity inactive.

See Also

• trigger_tonemap