Le_Forgeron <jgr### [at] freefr> wrote:
> The issue is with the container object vs automatic bounding.
> The function is mainly irrelevant in the issue (but it happens only for
> isosurface, so we need some anyway)

Are you sure you're not just messing up "contained_by" and "bounded_by"?

"bounded_by" is intended to provide the renderer with a manually-optimized
bounding shape instead of the auto-generated bounding box.

"contained_by" is intended to clip away parts of an object's surface (namely all
that lie outside the clipped_by shape), and has *nothing* to do with bounting.

(I think it's even mentioned somewhere in the FAQ.)

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