Great!

pjz99, you were right (as always).  The problem was the Diffuse_Color black instead of white. Thank you very much!  :thumbupboth:

Jitse, your computer screen is wonderful! I am studying its materials and doing some experiments with glow, ambient colors and refractions. If only my PC was faster!
BTW, I am sure you have recognized the subject of my visor!  :biggrin:

Giorgio

giorgio_2004 here, ksabers on XBox Live, PSN  and everywhere else.