Well, in the vanilla versions of Poser you have to sort of "fake" it by turning all the diffuse values on the textures down to about 0.85 rather than 1.00. And I guess it's not on by default in the Pro versions because not everyone uses it. Those that use it can turn it on if they like. I don't think it's a fix for bad lighting. It's quite different from lighting as far as I'm concerned. Even good lighting can't give you proper contrast.

Laurie