Hi Michael.

Here is an example file. Both are solid polysurfaces, but the one with 3-sided filleted corners is an invalid object.

jonah

Thanks Jonah - I see the problem, the offset of the 3-sided fillet is not totally clean, the points that are supposed to be all collapsed together at the pole are slightly separated. This is messing up stuff later on.

I think I should be able to fix this up, but I won't be able to give it a try until after the new meshing stuff is done.

- Michael