On 2022-03-30 02:23 (-4), William F Pokorny wrote:
> Try flipping the order of objects in the union with the inherited hollow
> and "I think" you'll get again a v3.6 result with v3.7 onward versions
> of POV-Ray.
Yes, it wasn't until after my initial post that I suspected this was the
same as issue #307. Reversing the order confirmed that it is the same
bug. In fact, I was the one who discovered it back in 2017, although it
was Christoph who figured out the nature of the bug.
> Overall, the issue has been well down on my 'povr' todo list for a long
> while because to me it's not clear what the right thing to do is. Seeing
> clearly will take a significant investigation I think.
It's still in triage on GitHub.
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