On 06/05/2015 03:52 AM, Rolf Umbach wrote:
> I have a transparent object created with a sphere_sweep and some light sources
> around. The problem is that the transparent object (a helix - see attachment)
> produces solid/strongly reflecting solid sections normal to the sweep. I guess
> these are not supposed to be there and I was wondering if there is a way to get
> rid of them.

Which version of POV-Ray are you using?  I get vastly different results 
depending on which version.

The sphere_sweep object is known to be buggy, especially with cubic 
splines.  But again, the bugs are different depending on the version of 
POV-Ray.

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