Ray tracing programs..?

[Michael P. Reilly]

I am looking for an easy to use ray tracing program for the sun.
Currently I am using "vort" it seems to work pretty well, but I can't seem
to get color output on my color 3/60, the colormap does not seem to be
loaded correctly with the 'disp' program that came with vort... so I could
either use some help with vort, or the location of a different ray tracing
program...

Thanks

mike at murphy.com