Industrial strength Raytracing package. Sources only, but no problems
compiling under linux. Needs X11 to compile/run. This is a big program,
but it is does VERY accurate tracing of light rays, and resulting images.
Best used with a CAD program to create the scene files, but can be used 
by hand. Source site: hobbes.lbl.gov.

		Ziggy ( trwills@indyunix.iupui.edu )