You can now render with 3Delight straight from Blender with Matt Ebb's new addon.
An external render engine exporter for Blender 2.5
This addon allows rendering blender scenes in 3Delight, a renderman compliant renderer. Most (but not all) of the code is generalised and should be compatible with any renderer that accepts RIB, however for convenience, it’s designed for use with 3Delight.
It’s not intended to be an extremely flexible and customisable pipeline, rather it’s meant to be a bit more straightforward and less complicated for individual artists or small teams to do practical work with.