In my opinion, none of the Poser shader abilities are "correct" for hair. I know how to do numerous things well, with a shader that works in 99.99% of situations, for many materials - but not hair.

This is an area where a "physics based" shader just cannot be built for Poser, using only the nodes they give us at this time. (Future readers - perhaps this statement is not true - so pay attention to the date and version. I'm talking at a time where Poser Pro 2014 is the most advanced we have. I know nothing at all about future versions.)

So - what are we to do? Give up?

Well, no, but this is a situation where I can only provide guidance. The details will be coming from you, and will be in response to the textures you're given, the hair you're working with, and the lights you're using.

Ready?

---

Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)