Hi JTB, looks like a bug in the surface offset mechanism in the geometry library.

I'll take a look and see what if I can find out what is involved in the bug, but for the moment a quick workaround to get it finished now is to split it into 2 halves and use "ShrinkTrimmedSrf" (this has to be set up on a keyboard shortcut, there is not a button for it), then it can be shelled. I've attached a result.

- Michael

Hi JTB, this has been fixed up for the next v2 beta so that your original surface here will shell properly in the next v2 beta.

- Michael

and it's also working in v.1

/Lars

Hmm that makes it a regression in some of the earlier updates to the geometry library that was applied near the beginning of v2.

For the next v2 beta I have another geometry library update (not quite as big as the one from earlier in v2, but several fixes) and fixing this regression seems to have been part of this new update.

- Michael