I used Surreality’s Melancholi for V4 last time I did something Snow White themed. If you’re using DS4 or DS4.5 you should be able to apply it to Genesis, I don’t know if that works in Poser though.
Surreality’s stuff is almost invariably Poser-exclusive. SHe uses *lots* of procedural shaders and other Poser tricks in her products. Ity wasn’t until DS4 came out that she was able to get Studio to run on her machine, so she concentrated on Poser materials.
The gemotry works fine with both, and the basic skins usually work, but the special stuff is mostly for Poser.