Thanks for taking a look at that, it would have bothered me for a while.

After reading various threads on the explanation of why parametrics are so slow
to render, and how there can be problems seeing where the surface is supposed to
be rendered,  I decided to see how fast the equations could be plotted out if I
"manually" ran through values of phi and theta.  I figured this would also be
independent of any reliance on contained_by shapes, and would help rapidly
troubleshoot parametrics.

of note:  I started out trying use "functions", and after contemplating
POV-i-cide, decided to just declare equations and while-loop through them.

Results at:
http://news.povray.org/povray.binaries.images/thread/<web.53cec54fc9bb24105e7df57c0%40news.povray.org>/


Even with the frequency (2 radians) and the bells and whistles, it renders for
me at +q9 in 25 sec.

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