Hi,

I went searching for a macro to round out the corners of linear 
sphere_sweeps, but was not successful. So I made my own :) It's easy to 
use: you just provide the spline points (and optionally the arc radii) 
for each point. It automatically joins the first and last points if they 
are the same. Since the object is made out of cylinders, tori and discs, 
the render time is pretty good.

The include file and an example scene are available over at p.t.scene-files:
http://news.povray.org/povray.text.scene-files/thread/%3C4c3d20db%40news.povray.org%3E/

Happy Ray Tracing!

Sam

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