Rayshade is Easy to Use!

$\textstyle \parbox{1in}{\begin{picture}(1,1.1)
\put(0,.05){{
\ifnum =4
\mbox{}...
...or \csname psfigure\endcsname }
\fi
\end{picture}\hfill
\fi
}}
\end{picture}}$% echo sphere 2 0 0 0 | rayshade > sphere.rle