The algorithm calculates all possible specular reflections up to some order. I really don't think I can explain it any better than this paper: https://mediatech

The algorithm calculates all possible specular reflections up to some order. I really don't think I can explain it any better than this paper: https://mediatech.aalto.fi/~samuli/publications/laine2009aa_paper.pdf https://mediatech.aalto.fi/~samuli/publications/laine2009aa_...