CompuServe Messages

Bill: When one of these concave objects causes a problem it becomes impossible to even load into 3ds. I have had one exception, one "donut" object actually came into 3DS but I also got an extra face which cut off half of the rectangular hole. I didn't mess with it since an identical copy of the object came across without a problem. Its the seemingly random nature of this one exception that keeps me trying different options and never saying never. These successful "donut" objects were not created with a boolean subtraction but by extruding two concentric rectangular loops, just want to make sure you get the whole picture. Boulean or extruded, I avoid this type of geometry in my solid modelling only because I can't predict if it will be importable to 3DS. I tend to keep the solids simple and model up a bunch of simple pieces instead of one complex whole. Bob