This illusion usually requires that you buy a special photo or vacuum formed picture but this instructable shows you that it is possible to make with any photo.
Once you create the illusion photo you must video it to see the illusion. The illusion is one of depth. The photo, which is bowl
shaped with the photo inside the bowl, will appear to be a 3d picture "outside" of the bowl. This illusion can be seen without videoing the photo if you close one eye.
Watch the video to see an example and look at the steps for details.
Step 1: Print Out Photo
Step 2: Cut Photo Into Oval Shape
Step 3: Cut 4 Lines on Back of Oval
They are for the purpose of making the photo into a bowl shape.
Step 4: Overlap Cuts and Tape
After taping all 4 cuts, turn photo over and it should be bowl shaped.
Step 5: Hang Photo on Thread and Video It
Then video the photo with your camera.
If you video tape it using a slight down angle it seems to make for a better 3d effect.