Hello,
I know that for generic plastic material, the third raw contains values for reflectance, specularity and roughness.
As I will use colorpict to render a textured object imported from an obj model I wonder what happens with those values when a picture is applied. Is it just reflectance affected and in which way?
The Radiance reference manual is the place to look for this kind of information: https://floyd.lbl.gov/radiance/refer/ray.html
Under the entry for “plastic,” it says “A pattern modifying plastic will affect the material color.”
There are other important documents linked to the parent page at: https://floyd.lbl.gov/radiance/framer.html
Cheers,
-Greg