Any idea what cAr, cAb, and cAg are?

[Trainmaster9977]

Looking through shader code/metadata and stumbled across that.

[ScanMountGoat]

I haven't looked into those values personally. You should be able to use the metadata to figure out which values in the shader code to edit in RenderDoc. If I had to guess, it sounds like something related to color grading. It should be a lot clearer what they do after hard coding different RGB values in RenderDoc's shader editor like (0,0,0), (1,1,1), (1,0,0), (5,5,5), etc.