Keymaster : Actually, it can look a lot better with a true skin shader, believe me :) I'm the artist, you the programmor haha :)
There is also some bugs, like everywhere there is wrinkles, it's getting dark in those wrinkles... look odd. ( it seems to be the bump the problems, I'm doing test on it now..i'm not 100 % sure it's that but look like it is)
second thing, the front scattering would be much better with a true skin shader, we will feel more the deepness of the skin instead of more plastic like now.
Third: there is no prepass ID like in vray skin shader so I cannot make things blend perfectly togheter.
fourth: it's really slow to render compared to a skin shader since it's volumetric thing.
fifth: It's hard to set up to mimic skin since it's not done for that purpose.
six: Backscattering ( in fact all scattering ) would be a lot better with a true skin shader .
seventh: the light do not affect the object like it should be(because it's volumetric thing and not solid I guess..), I had to play with the values to get something closer to normal.
EDIT : also it lack a scatter radius fonction, etc.
I'm doing these tests mostly for you, trying to show you something else then arch and to motivate you to do the skin shader ( even if it don't have a hair shader for the first release , just saying to peoples it will come soon so peoples know it :) ) and do the skin shader, but as I said, I have no idea the time it take's to implement it.
Edit * : delete my quote please lol
I will post some new images tonight :)