Christoph Hormann <chr### [at] gmxde> wrote:
> The documentation is quite sparse in that section but still it should be
> obvious that union is something quite different to merge, intersection
> and difference - it just groups the object but does not change the way
> they are rendered.  But indeed the docs could explain this in more
> detail since it is quite important - there also is a FAQ entry about it:
>
> http://tag.povray.org/povQandT/miscQandT.html#csgspeed
>
> Christoph

Thanks Christoph!

Part of what the FAQ entry says is:

"In this type of cases POV-Ray makes a huge bounding box which is useless.
You should bound this kind of objects by hand (specially when the it has
lots of member objects). This can be done with the bounded_by keyword."

....which is what I think I need to do.

Thankyou for your help.

Nathan

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