Attached Link: http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2672418

I'm not sure how much Reflection really has to do with her dress, but I've just recently figured out how this is accomplished in Poser.  The Infinite distances in a Poser scene are really empty space, so they do'nt offer anything for a reflective raytraced material to work with, as they would  in Vue, or Bryce. The idea is to build and illuminate an environment around the reflective(Or Transluscent) material, in order to make it show up.

The fast way to do this is with what is known as a Sky Dome.  The link attached has has more links to other recent threads on them.