This always brings up the topic to me of just faking everything. We try to get to a point where we respect the laws of physics, but time and time again I’ve just heard people say, it’s all about artistic freedom, if it looks good enough and gets the point across, you can just fake it. Use a cement texture for a scratches surface, glossy for metallic, metallic for glossy, etc, etc. So all that to say, best practices is to follow things as they should be, but never forget about artist license.
