Worley Labs. has just released their G2 lighting and shading system for Mac OS

Overview:
G2 is a lighting and shading system for LightWave Layout.
G2's powerful preview system gives instant, accurate, and continuous updates of your changes.
G2's subsurface scattering renderer creates new translucent materials that were previously impossible.
G2's skin shading model makes truly realistic human appearances.
G2's shading options add new power to every part of your object's surface.
G2's image processing solves gamut and compositing problems right inside LightWave.
G2 simply can't be described fully with just one page of a website. The twelve links to the left will lead you to many more G2 details