You're better off with simple, Poser 4 style shader setups. Because Poser shaders won't transfer over to Luxrender, it doesn't matter to the exporter what your Poser shader setups are since you will need to change them to something Luxrender uses and understands. Because the exporter doesn't really understand nodes attached to Alt Diffuse and Alt Specular, those are best left empty. It can always be overridden in the script though. Also, you might want to make sure that ambience is turned off on any material zone that you don't want to glow ;o). The exporter sees ambience as a light source and will make that material an emitter. This too can also be adjusted directly in the exporter on the emitters panel.

We finished the draft of the User Guide, so that should be coming soon when everything's been finalized and there's no glaring boo-boos :o).

Laurie