I'm trying to boolean difference the attached (https://www.dropbox.com/s/irq4mq6699361cu/BooleanFail.3dm) to parts (subtract green part from blue part). The blue part is a cavity with solid walls enclosing an empty space. The green one is a solid part. Any idea why it fails and how I can make it work?
I wonder if this might have something to do with it: when I turn on a clipping plane and look at a cross section of the parts, the green parts cross section appears solid where it should be, while not so for the blue part. See what I mean?
On a side note, the clipping plane setting does not work for the perspective view unless I switch it to a view other than perspective, create the clipping plane, and then set it back to perspective view. A bug perhaps?