Quote - Yes Kawecki! You describe exactly what I did. I measured the color at low and high incidence angle and use the single Fresnel to blend between them.

Good, if it worked this is the way to solve the problem.

All is a big confusion, I am working on different models for metals, there are so many models, Beckmann-Kirchoff, modified Beckmann-Kirchof, Cook-Torrance, Sparrow-Torrance, He-Torrance, Ward and many others, and you can add several different shadowing functions, but ..... which is the best ??????

Stupidity also evolves!