Physically based rendering

I have to say, it turned out to be much more complicated than I originally expected, but here are some first results — carbon with clear coat, so reflections (from clear coat) use one set of normals, lighting is based on another, but clear coat also adds a second specular. 

Here are PBR shaders set for P1:  https://acstuff.ru/u/comparison/pKm 

They’re compatible with original shaders in textures, so it’s easy to swap them with extension config. But all of that is very experimental, not sure if I’ll keep it as it is.

Thank you all for your support! As always, if you have any suggestions, please let me know.