Anything that goes from one program to a renderer (Luxrender) will have to have it's materials converted to something Luxrender knows and understands. Reality will convert your Poser materials to Luxrender materials that are comparable. Therefore you don't even need complex materials inside Poser - they'll get converted anyway. When I use Pose2Lux I make sure all my texures are basically Poser 4 style texures. The exporter converts them to a Luxrender material.

Laurie