digman, thanks a lot! I really appreciate you taking the time to find a solution and even searching the modo forums although you are not a modo user! I also appreciate the opportunity to directly contact you in a google hangout. Unfortunately I don't have a microphone. But if I'm not able to solve this problem I'll try to find one so I can talk to you! Thanks for that!
I already tried to give that area around the eye more texture space. I even tried to let 3DC find the best topology by just moving the head into a new project, then running the "AUTOPO for MV" feature. Topology looked very different then and I had a lot more UV island. I manually increased the size of the island around the eye but that did not help. The wrinkles still looked jaggy in the paint room so I even did not take them into modo.
I'm not in front of 3DC right now but I can show you my settings for scan depth and padding later if that helps.
I must admit that I don't understand completely all the options when merging the model into the paint room. For instance: what is "UV sub patches smoothing"? What does "Preserve positions" do and when do I need those? I'm also confused about "Millions of polygons". The popup reads something like "should be more than amount of pixels in the texture". I've got four textures. But changing this from 20 millions to 80 millions did not have any visual effect in the paint room. It just slows everything down by eating up memory.
3DC is a powerful tool but it has a lot of mysterious options. :-)
Thanks again,
Michael