Still loving your sculpt, Scott!

Educational details for the rest ... Two key points to be made in Scott's shader that help elevate the skin detail. 

1) Skin bump was not created from the color/diffuse map. The skin details were created by hand in ZBrush, using high quality skin detail alphas and textures. After sculpting, they were exported as both Bump/Displacement (grayscale) and tangent space Normal maps.

2) A roughness map was generated from the hand-detailed Normal map. Physical Surface node and Cycles/Principled BSDF nodes do much better with roughness maps than specular maps. 

The skin bump, normal, and roughness maps are provided with Poser and can be found in Poser 13 Content > Included > Runtime > Textures > RPublishing > LaFemme.

I've been debating creating simliar bump, normal, and roughness maps for other figures. Because they really do make a difference in SuperFly. With simple PBR shaders, the textures do most of the heavy lifting, as Scott's simple skin shader demonstrates.