Yes, I'm aware of those features built into that shader version; I have to revisit that when I have an opportunity. I am not too comfortable with some of the node arrangements; they just don't look mathematically correct, and I have observed questionable arrangements in this version. I just uploaded the P11 version of the shader posted using the Physicalsurface root node with my modifications at the other thread. Everyone is welcomed to test drive it. If I'm so inclined, I might add ambient occlusion to it.