Quote - Using Specular maps, and bump maps,normal maps are from the past school.

All you really need is ONE single good diffuse map.

The problem is color intensity of a texture map doesn't always give you correct values for a bump map. Wrinkles are dark in color as are things like pores, skin creases and lip furrows. Invert your texture and these become 'hills' instead of 'valleys' in your bump which is obviously wrong. And of course, if you don't invert, you get valleys where things are dark like hair, pimples, blackheads etc which is again wrong. If you really want to extract a bump map from your color texture, you need to selectively extract detail from it, then level it to appropriate bumpiness, invert as needed, then mix it all back into a single bump/displacement map, all of which is very hard to do with the poser material room alone. It's easier to just have a separate map that you can further enhance with hand painted detail.

And specular maps have very little to do with colors or bumpiness. They should almost always be painted by hand because they don't need any detail, only soft clouds of 'oil' on your skin. The detail automatically comes from the bump map when rendered.