Many years ago I had a program called Fractal Design Painter. (I don't think the program exists anymore) Anyhow, it allowed you to make an image that would tile seamlessly - every time your brush went off the canvas, it would appear on the canvas in another place and continue to paint. When you tiled the image, the seams would not show. Does anyone know if Photoshop can do this, and if so, how? Thanks so much!