Hi Steve, did the piece that you had problems with in Rhino have overlapping surfaces in it? I mean did some of the pieces share surface area in common instead of punching all the way through each other (which results in a curve at the intersection spot instead of a common surface area) ?
Those types of situations tend to be more difficult to handle well, and it is an area that the Solids++ geometry engine that MoI uses seems to handle pretty well, although it can still get confused if you have quite a lot of overlapping pieces.
But in general booleans have turned out to be a particularly strong area in MoI's geometry library.
- Michael
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