Iray is a PBR (or close to it) and so is Superfly who's core is Cycles by Blender. If you were to use Poser 11 or Poser Pro 11 you can get similar results as Iray. We have some pretty good lighting gurus who have worked on this and are continuing to explore the possibilities.

Boni

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"Be Hero to Yourself" -- Peter Tork