By rendering two slightly different versions of the same exact 3D scene, with the camera slightly shifted to the left in one of them, I can mimic the two slightly different perspectives seen by the right and left eyes and create a strikingly realistic three-dimensional effect. For some of my full-size "3D" pictures (which are actually only 2D representations of 3D scenes), I have created these stereograms for your viewing pleasure. At times, I have enhanced the 3D effect by making the cameras (your "eyes," as it were,) further apart than they actually should be. There are two versions of each of them, as there are two different ways to view them. Try both and see which works best for you.
         The first (represented by an "X") requires you to be able to cross your eyes. This is actually the only way that I'm able to do it. To properly view this version, sit up straight and make sure your eyes are vertically even (and approximately perpendicular to the screen). Now cross you eyes so that your right eye sees the left picture and vice versa. The further you are from the screen, the less you will have to cross your eyes. What you should see now are three pictures - one sharp one in the center and one faded one on each side. If you are not yet accustomed to doing this, you may have to allow your eyes to "relax" a bit until they meld the two separate pictures into one sharp central image.
         The second method (represented by "| |") is exactly the same, except it's the opposite. Again, sit up straight, but this time, stare straight through the screen so that your right eye sees the right image and vice versa. Again, let the middle two images meld together to form one sharp central image.
         I hope one of these works for you. Good luck, and enjoy!