I generally use Boolean >subtract (A-B) to produce a compound object when I
want it to have a hole in it, but if that object has many holes, like. . .a
spaghetti strainer, or . . a computer fan (triangular slots), then I notice
that after applying the 2nd and 3rd holes, etc. that these subsequent holes
have no thickness to them. That is, the edges are not being capped,
although the first hole always works the way I expect.
Is there a better way to render an object with many pieces cut out of it? or
is there a setting I should use during a Boolean subtract operation on an
object that is already a compound object?