I'm taking poser figures and CNC machining them to make real, solid 3D figures. I want to start machining molds instead of figures. So I need to take a cube and subtract a figure. Anybody know of something that can do this? Ideally it'd be some simple piece of shareware, but something general purpose that would do boolean operations and would let me edit NURBS would work. I have: Bryce (which has a negative operator but doesn't do this properly), Corel Dream, Poser 4, and TurboCAD.