Thanks ! So how do you get multiple collision objects for a single simulation? Multiple times I've tried selecting the first scene object, convert that to collision, then selecting the second object, and when I click the Collision button VWD freezes, and after a few minutes says the second "object not found", then freezes some more. And if I just keep clicking to start a sim (even though not all the buttons are visible), the sim only has the first collision object and the cloth object. But the second collision object is missing.