'Autostereogram' is the proper term for the pictures that pop out and appear to be 3-dimensional, but they are also referred to as SIRDS, which stands for Single Image Random Dot Stereogram. These pictures are usually made on computers. Here's the first autostereogram for your enjoyment. This picture shows seven mushrooms of various proportions. If you can clearly see this picture you've mastered the technique! However if you are still having trouble deciphering these images, then go back to page one and keep trying with the dots. It will take practice so be patient. Still interested is seeing some more autostereograms? Feel free to view the next one.