So here is a final render as rigging is done, corrective shapekeys also.
I will make driven normal map for veins and skin morphing but I don't think this is so important in a still so I'll call it finished.
Please note all these tips are included in short tutorials I will post along the way.
Cycles render
Original size 3500x4700.
600 samples.
85 minutes render time
Postproduction (I've try to make it subtle and proceduraly makable not to cheat on my lighting and shaders) in photoshop.
close up :
http://blenderartists.org/forum/attachment.php?attachmentid=356627&d=1421672610
http://blenderartists.org/forum/attachment.php?attachmentid=356633&d=1421673148
