> 
> Here is sample image of iso_sphere_sweep
> Currently it is designed for linear sphere sweep with constant radius.
> I'm working on float radius just like "traditional" linear sphere_sweep works.
> Render time 11 min on P4 900 MHz iirc.

Wlodek, I too have been working on such a iso sphere
sweep feature as you describe here.

I don't know if you ever saw these two pictures
that I posted to this group earlier: (?)

"Iso-sombrero" (22. Nov. 2000)
http://news.povray.org/povray.binaries.images/13218/
news://news.povray.org/3A1BC496.F202B75C%40online.no

and:

"Outside It" (29. Jan 2001)
http://news.povray.org/povray.binaries.images/13533/
news://news.povray.org/3A75E2D9.BCDC99AE%40online.no


Both contains a kind of "iso-sphere-sweeps" and
both were made with Mega-POV.

But the "sweeps" within these images are not made
with parametric functions, as some other iso-sphere
sweeps I have seen in here. E.g. by Mike Williams.
He has even made web pages about this:

http://www.econym.demon.co.uk/isotut/splines.htm


I hope this helps.


Tor Olav

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