If your looking at the shot through the camera, aren't you looking at it in perspective? I know what your getting at though, with a vanishing point. But by moving your camera around, you are in perspective, that's the beauty of 3D software like Bryce, it makes it easy to have perspective. One idea would be to make a cube and stretch it out and rotate it so you looking down it, then delete it, if that makes any sense. Good luck. kaom