Ray Tracing?
WEll,
I'll put in my two cents on POV-Ray. It's a great way to trace. If you get a
program such as Moray v1.5, you can do graphic modelling then export to POV
format. POV-Ray is very powerful – slow at times though:>. If you use
3DS2POV, you can model in 3dStudio and then convert to pov format.
Aaron the Good