coanda:
there must be a Poltergeist or three in the booleans of AC3D: sometimes they perform quite OK, other times you have to darn a few stray vertices and surfaces but the result is still usable, every now and then you'll better find an alternate way if you want to retain a modicum of sanity.
Even more disconcerting, they appear to work somewhat better in my office (on an old piece of crap under Win2000) than at home (on a brand new 2.2GHz dual core under WinXP) - and don't ask if it's because of the operating system or the hardware crapness for I haven't the slightest idea.
I already pestered poor Andy on the matter and I guess he's now quite fed up with me and my boolean obsessions
lisa:
forget about the old booleans, I've been trying to use them for nearly one year without being able to squeeze anything really reasonable out of them
However Dennis' good ol' knife works all right and is a fine tool if I ever saw one.