When you look straight on to a piece of illusion knitting you see only two-colour stripes. The picture is revealed when you look from an oblique angle. Photographs do not do justice to the amazing effects. It is very difficult to photograph them from the correct angle.
The illusions above are designed to be seen from the side. Those below (except Hagrid and the mature Harry Potter) are designed to be viewed from the bottom.
Click on the photos to go to pages with larger pictures.