>     You might also try a difference instead of an
> intersection.
> 
> Ken Tyler
> 
I'm a relative newcomer with POV but I've had some experiences with CSG
and found that especially difference took a very long time to render. I
didn't expect that, nor did I expect blobs to be quite fast in
comparison. I must add that I'm working on some images using differences
with non-primitive forms. I guess that makes it even more complicated.

Is there any 'rule of thumb' in this?

Remco

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