There is a problem with the skin being too specular. If you are going to use the alternate_specular channel on the PoserSurface node, set the Specular_Value channel to zero. Otherwise, you will be multiplying both channels and doubling the effects. Any map plugged into the Specular_Color channel should be grayscale, not a diffuse map, according to your screenshot.  The specular map needs to be plugged into both the Specular_Color and Specular_Value channels. Additionally, Diffuse_Values and Specular_Values should never be set to 100% (1.0), as nothing in nature is 100% diffuse, and 100% specularity only occurs with metallic materials.

I have completely moved away from using the PoserSurface node for Superfly rendering. Instead, I use Cycles shaders for all my renders.