k3d/share/shaders/k3d_skin1.sl:205:  color Csheen = sheenColor;
k3d/share/shaders/k3d_skin1.sl:231:      Csheen = color texture(sheenmap);
k3d/share/shaders/k3d_skin1.sl:264:  lc =  subsurfaceSkin(Vf, Nf, blemishcol, Csheen, 1/eta, thickness);
