Attached Link: http://www.enmeshed.com/shadermagic/

Link is to a tutorial shows you how to adjust textures for P5.

If you don't have time to actually follow the tute, it includes P5 MAT files for the DAZ V3 high-res textures.

Lighting does make a big difference. Generally, the brighter the light, the paler the skin will look. It's not easy to make pale skin that doesn't wash out in bright light, so that may explain why textures look dark under some lighting.

You might want to download some of the free light sets at RDNA. I like the LaRoo Pinup lights myself. Even though I don't own LaRoo. They look good with any figure, and render as quickly as the default lighting, but look much better.