Thats not possible with my povray code, *at the present moment* (see at the bottom). However most of the avatar pics I've seen have no "real" ridges, its only that the transitions between light and dark in the head texture at that spot create a "fake" 3D effect (fake shadow/highlight).
DarkJak, I don't have your head :P the latest toribash version downloads those on-demand. I'd love to test with it, though.
If you lower the reflections in my povray code (edit it, amount is at the top of the file) the ridges will look more believeable. (even at 0.4 they are still kinda-believeable). As the reflections go higher it becomes easier to notice that the ridges are fake, because the reflections dont bend along their lines.
I'll be trying to modify the code for that later. I think I can do it with a bump_map normal, using the original head texture as a bump map. We'll see if I can get some nice results
edit1: okay I got the ridges right! I'm now rendering a silly render with deep ridges of my head, and will post it as soon as its done rendering.
edit2: Voila!
of course, in this particular render they are too strong. by editing the options at the top of the povray code you can change their strength.
Last edited by Spion; Nov 2, 2008 at 05:09 PM.