Ken <tyl### [at] pacbellnet> wrote...
> I have heard many arguments for and against and so far the consensus seems
> to favour not including them in POV-Ray. Yours is the first I have heard
> where better quality is mentioned. Most argue in favour of smaller file
> sizes than their triangle counterparts.

NURBS, like subdivision surfaces, can be adaptively tesselated at
render-time.  This allows very high quality using very little memory at the
cost of slower render speeds.  Intelligent caching would probably help with
the speed problem.

-Nathan

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