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$allowdiffusemodulation is a material shader parameter available in all Source games since <Left 4 Dead> Left 4 Dead for VertexLitGeneric. It prevents a material from being tinted by either $color2 or the rendercolor parameter. This is useful for situations where you have a model made up of multiple materials, some which you might want tint-able and some not.

Note.png Note: This parameter exists as $notint in <Counter-Strike: Global Offensive>.


$allowdiffusemodulation <bool>