My suggestion? Set up something simple with a few different kinds of materials: skin, shiny things, dull things, some glass, etc. and see what the Pose2Lux Luxrender mat presets look like. Then, when you have things in Luxrender, play with it's settings and see what they do. You can always start over (and you will, more than once....lol). And it's fun!

ps: I have this weird fascination with turning lights on and off in Luxrender as it's rendering...lol. Simple amusement for a simple mind ;).

Laurie