Ron Parker <ron### [at] povrayorg> wrote in message
news:38dbcb75$1@news.povray.org...

> ..... Thus, most differences are
> bounded by the bounding box of the first object in the difference (This
does
> not apply to differences that include inverted objects.)
>
> Thus, your difference is bounded by the box and the spheres are ignored.
If
> you can bound it more accurately, you should.
>

That's what I expected - ie. the differenced object can not be larger than
the first object in the difference so apply that objects bounding. What's an
inverted object?

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