%CompileNoLight
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Note:This parameter is also available in Source 2013.
Tip:In
's VertexLitGeneric, a similar effect can be applied on models by assigning vgui/white to $lightmap.
When this parameter is added to materials, it will tell VRAD to not compile a Lightmap page for that material, which saves compile time. Valve introduced this parameter with Alien Swarm, using it with tools/toolsnolight.vmt
, the black areas you see in the levels.

Useful for LightmappedGeneric where you need to use some parameters that UnlitGeneric lacks.
Syntax
%compileNoLight 1

