Alan1961 wrote:

> Is it possible to declare an object in such a way that when it is unioned with
> another object(s) it carries a "hole" with it?

No, unfortunately not. Also, you should be aware that
min_extent and max_extent do not reliably represent the
minimal bounding box of the object, and that the object
used for cutting a hole should be thicker by at least
a tiny amount than the wall, as coincident surfaces
produce unreliable results as well.

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