Hi All, I'm interested in creating models of appliances that the user can interact with and that have the correct physical responses for product development work (AKA serious games). A toaster oven is a good example. Need to be able to put toast in and it move through on the conveyor before falling out the other side. I've done this type of thing in Solidworks before but the physics has to be rendered and it's really designed for rigid body work (no fluids/cloth/particle). I used Blender which has a nice IDE for creation and game logic. Have looked at Torque 3D, and 3DSMax (with Reactor) but the physics are always pre-rendered. I need game style effects where the physics are based on the actual interactions at the time of the event (think car crash in GTA) Now I'm looking at microsoft products (XNA, Robotics studio). I need an integrated physics engine such as PhysX/Havok/Bullet and wondered which package is better for the task. I have solid programming skills and a large budget. My aim is to choose the most versatile tool so that I can whip up models for quick concept demos. Any thoughts greatly appreciated. Thanks, Medic