tony, the effect you describe (causing a posersurface to emit lite and to illuminate
surrounding posersurfaces) is possible in poser 7 and later.  see page 109 of
poser python manual (p. 113 of pdf file) for further info.  this effect is superior to
the fake method that's currently supported (gather node) in that it gives far denser
photon mapping.

we are awaiting word on whether poser 8 will have a rendering engine more
compatible with this effect, as FFRender's calculational abilities are taken to the
limit of all known desktop computers when the variables on page 109 et seq. are
enabled IMVHO.  as always, beta testers are strongly advised not to say anything.