here are some doodles/3D sketches done in mudbox&rendered in vray:
edit: I added a fullboy sketch. It's a dude with some ornamental costume or bioarmor thingie on him. He has a bit of a gynoid form, with broad hips and thighs. It's still in a rough stage , but I don't know if I'll continue to refine it. The head, hands and feet are very sketchy, I just blocked in some main forms, hinting at fleshy and bony structures. It has a little under 1 million polyz. If I were to subdivide it further I would have to brake it into separate parts because mudbox can't handle more than 2-2.5 million polyz on my 512MB RAM P4. I used somebody elses basemesh http://www.tweakcg.com/forum/viewtopic.php?t=307 . I don't know if I'll retopologise it. I think it will remain just another exercise.