What would this enhancement be for?
Rendering
Describe your enhancement suggestion in more detail
In Source 2, there exists a vmat parameter that makes emission textures pull their color from the color texture, making the emission texture effectively act as a selfillum mask. The primary purpose of this behavior is to be combined with tinting keyvalues in hammer, which allows the parameter to basically tint the emissive texture alongside the color texture's tint, allowing dynamically tintable light sources. An implementation of this parameter would be especially useful in Strata's PBR shader, as it would solve the longstanding issue of not being able to tint selfillum textures.