Bear with me, because I don't know what these are called: In the various MP3 players, they have visualizers, some of which look like 'space warps' or some such. I understand these are generated on the fly, and cant be controlled. I'm making a mini movie and the cloud-like effects I see in these visualizers would be perfect for exterior shots. Only problem is, I can't find software that can generate these effects. What I need: Software that allows the design and control of generated 'scapes' (I'm a bit lost here) where I can specify the color, speed, particle effects, frame size and frame-rate (720x480 24fps, 30fps, 60iFps) A number of videogames have visuals like what I'm trying to describe, and with a joystick, one can move around this environment. I'm on Mac OS X, but I do have access to a Win98 PC.