"unless they offer some sort of plugin support for stand-alone renderers that do support GI. None of the "Reyes" renderers support it that I know of." Pixie does, and you should be able to use it with Poser with its built-in RIB export or with my PoserMan export. PRMan from Pixar would also be a REYES renderer that supports GI, but that one costs quite a few bucks.