“There are many rendered portraits in a lot of galleries. I was always impressed by the high quality of the MentalRay FastSkin shader and how easy it was to set it up once you understood the basic concept of how skin works. But as I “only” have Cinema 4D, MentalRay is not an option for me. But isn’t it possible to render realistic skin in Cinema 4D? I wanted to find out with this project.”
http://www.cgarena.com/freestuff/tutorials/misc/silentman/man.html