Setup for extreme-stereo images
I could never get my mind to see the magic eye images I always had to rely on the ones with glasses. My brother has a nice collection of the older stereo grams with wooden viewer and glass lenses. Always great fun.
If you have never seen the flickering animated 3d images they are a great way to show off scanned images on the computer. The NYPL has a great site called the stereograminator that allows the public to creat them from the thousands of scanned stereo images from their archives. If you take a look there you can get a good idea of what works in there stereo images. Many subjects need to be in the middle distance to have a pronounced effect.