I´m trieing to perform am boolean cut operation between a shape that consist of several Faces an a cylindrical
shape. The expected result is a circular hole in the first shape. This works well so far, except the fact, that
some parts of the shape are missing after the cut operation. These parts are next to the "hole".
What is the reason for that? I tried to fix the shape with ShapeFix_Shape but alway the same result.
What are the condtition for shapes the perform a boolean operation?