[Oilcan]

Try this.

Pick a spot on the picture, just off center, say a 1" x 1" spot.

Now just continue to stare at that spot only, look at the spot like you are "daydreaming". it will take a few minutes until you get the hang of it.

Try not to move your head, or blink a lot. What will happen is you will eventually start to see "shape" or "depth".

At this point your eyes will be tempted into "re-focusing" on this and the whole picture. Don't. You just have to let it come into focus now, and it will, just don't move or refocus until you can "see it".

Once you get the hang of it then you can see these pictures all the time in less than 30 secs.

good luck

regards