but more specifically the Sub Surface Scattering (SSS) options inside blender trying to get some resemblance to realistic skin.
I sculpted the head in scuptris and then retopo'd the mesh in blender, baked the Normal and Ambient Occlusion (AO) maps from the scuptris model to the new mesh popped the AO map in photoshop and from there made the necessary textures for the sss shader, that being epidermal and subdermal as well as the standard diffuse and specularity textures
anyway heres some test renders (pic related :P)
