Pascal, here’s what happened…
I constructed the object and performed a BooleanUnion, which worked to create a closed polysurface. I assumed (I guess incorrectly) that I would be able to explode it and successfully union it again. Not the case. I guess there is something I’m not understanding.
Are you saying that if I have a collection of surfaces and select all, they should all join if there’s nothing wrong? I’ve only been using join to do a small number of surfaces at a time.
Also, if I join a complex number of surfaces, isn’t there a lot of trimming to do? If I do a BooleanUnion, all the trimming happens automatically.
You say that BooleanUnion is a different thing… Do you mean that it’s typically used to join solids, and join is used for surfaces?
Hopefully from what I’ve said here, you can correct any misunderstandings I have, for which I would be grateful. thanks, rex