THe attached pat (and js) make for a simple interactive keystone correction. In theory. the odd thing is that the texture warps, as if the plane is folded in the center, rather than just skewing uniformly. Draw a grid on a piece of paper and hold it up to the camera (or add a qtmovie and use a picture of a grid) and it's very apparent what I mean. It's neat, but not what I'm after. ANy thoughts on how to avoid this?