Ron Parker <ron### [at] povrayorg> wrote:
> Isn't that what bounded_by{clipped_by} is for?

A quick test shows that POV-Ray's automatic bounding is winning out for the
most part - on a torus spline with 100 segments (201 objects including
joining spheres), using manual bounds removal renders in 32 seconds compared
to 68 when bounded_by {clipped_by} is used with -UR.

The problem John is having might be something to do with the number of
objects he's rendering, or their CSG structure, and possibly highlights a
failing of the automatic bounding system - I'll leave it to John to post the
offending code...

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