On 11/8/23 11:17, Mike Miller wrote:
> I just took Kenneth's advice and
> tried making a few plant types with a zero-thickness box. It speeds the
> rendering up considerably!

If it works, it works. :-)

FWIW, such shapes are degenerate in that POV-Ray cannot fully handle 
them. They are likely to be flaky if part of things more complex. A 
polygon would be cleaner - but probably not faster.

Never taken a detailed look, but I believe a big part of the better 
speed comes from dealing with many fewer intersections internally. 
Either because they are not found - or because they are quickly 
discarded due not meeting criteria like the internal, min intersection 
depth filters.

Bill P.

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