Ok, finally got to terms with the dials... Took me a while to understand what each one does. At first I came up with those values, and liked it that way so I left them like that (and that's a terrible mistake). The effect has to be checked under different lighting schemes!! Thanks everyone for your advice... Ghostofmacbeth did you get good results? I don't think this shader is intended to make things glow but... maybe you got something out of it? And stewer, thanks for making things so easy. You are of great help. BTW, my settings at the moment are Ka:0 Kd:1 Ks:1.2 Thickness:0,5 Eta:1.5 But I'm still working on it... Thanks again!! Ike.