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It casts parallel directional lighting from the toolsskybox texture to approximate the light cast from the Sun or Moon.

Note:The properties of this entity apply to the whole map. Using more than 1 entity for areas with a skybox toolsskybox texture does not create errors provided If all instances of light_environment have identical info. It is pointless to have more than 1 though.

Tip:Use with env_sun and shadow_control.

Note:The light_environment still inherits most properties from the basic light entity. This means that the light_environment can be named (by adding the targetname keyvalue with SmartEdit off) and even disabled/enabled, although it will look very crude as VRAD only calculates direct lighting for named lights. Furthermore, there is a bug in games other than CS:GO where light from a named light_environment on static props will break when the light is changed.

Skybox lighting

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Skybox lighting/en

Keyvalues

Pitch (pitch) <angle>

Overrides the pitch value in Angles, even if left at 0, so it needs to be specified. Contrary to Angles, the rotation of this pitch is measured counter-clockwise from the horizontal, so that 90 is straight up, while -90 is straight down. (It's simply the negative of a normal pitch value.)

Brightness (_light) <color255 + int>

Color and brightness of the direct sunlight.

Ambient (_ambient) <color255 + int>

Color and brightness of the diffuse skylight.

BrightnessHDR (_lightHDR) <color255 + int>

Override for Brightness when compiling HDR lighting. Defaults to -1 -1 -1 1, which means "same as LDR".

BrightnessScaleHDR (_lightscaleHDR) <float>

Amount to scale the direct light by when compiling for HDR.

AmbientHDR (_ambientHDR) <color255 + int>

Override for Ambient when compiling HDR lighting. Defaults to -1 -1 -1 1, which means "same as LDR".

AmbientScaleHDR (_AmbientScaleHDR) <float>

Amount to scale the ambient light by when compiling for HDR.

SunSpreadAngle (SunSpreadAngle) <float> (in all games since )

The angular extent of the sun for casting soft shadows. Higher numbers are more diffuse. 5 is a good starting value. Remember: on cloudy days, the shadows will be blurred because the sunlight is being diffused by clouds. Try 90 for hazy days, and use 135 for cloudy days, rain and fog. If you're trying a night atmosphere, sometimes you'll need up to 180. You'll also have to turn down the shadow alpha in your shadow_control entity - try changing the Shadow Color variable to something such as 50 50 50.

Different SunSpreadAngle values. The quality of the soft shadows depend on compile options as well. Click to show animated preview.

Specular Color (specularcolor) <color255> (only in )

Color of the light that reflects off of certain surfaces. (i.e. water).

Pitch Yaw Roll (Y Z X) (angles) <QAngle>

This entity's orientation in the world. Pitch is rotation around the Y axis, yaw is the rotation around the Z axis, roll is the rotation around the X axis.

Flags

Initially Dark : [1] !FGD

Only works when the light_environment is named, and it must be added with SmartEdit off by putting in a 'spawnflags' key with a value of 1 as it is missing from Valve's FGD.

External links

• Nodraw.net - brief explanation with screenshots of various sunspreadangle values