The only way they'll look correct is when/if someone develops a set of maps that work with LuxRender's way of doing things, and probably also for LuxRender to get SSS.

Also, for those wishing to do animation, SmallLuxGPU is in development, which uses the GPU to render, rather than the CPU, which makes for significantly faster renders. Provided, of course, that you have a fairly decent GPU that supports OpenCL (newer ones do much better). That's not a typo, btw.