Thanks alot, Gen !!! Yeah I'm trying to learn this specular now, following https://support.solidangle.com/display/AFMUG/Specular , hopefully ill get the "aha" thought that reveals the problem for me. Besides, i saw that eye video you linked in the new 3d world magazine :p really an awesome work, so much inspiration... Ill get back to the eye soon again. once again thanks alot for all your help. i see some paths more clearly now because of you