CompuServe Messages

Don, there's a big difference between the way ACAD (and almost every other program that does booleans) uses a CSG system to determine the boolean result, and the way 3DS uses an arbitrary face-topology system. Using deterministic CSG-based primitives, it's possible to always get deterministic results. But using arbitrary manifold topologies, it's impossible to be mathematically precise. We really try our best, however. – G