Whenever I look at one of those stereogram pictures (you know, the ones that looks like someone puked a rainbow) Somehow my brain sees objects as holes rather than bumps. I can always make them ‘go 3d’ but I can never work out what it is that I’m seeing because the 3d-ness is back-to-front.
Diverging your eyes is something you do every time you focus on something farther away. For example: Bring the top of your computer monitor into focus. Now look at the wall behind it but keep an eye on the computer monitor. Notice how there are now two computer monitors in the foreground of your vision. They are diverged.
I would imagine so. It’s just a matter of swapping the picture to pop out when you cross your eyes, instead of look farther away (and it’d be vice-versa for divergence). I don’t know why they don’t just do it that way.
In fact, someone should fucking do that. Screw Magic Eye. Start a directly competing company that showcases the images best when you converge instead of diverge your vision.
Everyone can learn to diverge, though. It really is as simple as the trick I outlined above. Train your eyes to focus past the object in the immediate field of vision.
I can view them both ways.
One of my favorites is intended to be viewed both ways. It’s a 3-D version of that “Faces-or-Vase” illusion. When you view it with crossed eyes it’s a 3-D vase, but if you view it with divergence it’s a pair of 3-D faces. Definitely the coolest such 3D illusion I’ve ever seen.
I’ve always seen the holes too–never anything jumping out at me.
Pretty freaky the first time I saw one of those posters … I was at a Dead show. Some heads had them on easels. Not selling them, just showing off these new, entertaining mind-toys. Felt like it took forever, then shhhooommp–suddenly I saw down into where the shark was. It was all in my perception, but it was still infinite space captured on a finite plane. That I was seeing a background pattern behind the cut-out was all but impossible to describe, particularly in an already altered state where concrete descriptions can be elusive. Didn’t quite bother me per se, but took my wanderings in strange directions.
All I do is look for adjacent portions of the repeating pattern, and cross my eyes until I “lock” into the image, i.e. the repeating patterns overlap and then become one. Then I can relax my vision and take in the 3D image.
I learned to do this as a kid while sitting and staring out my bedroom screen window, which itself is a repeating pattern. This made the screen appear closer to me than it actually was. I must have been given a lot of time outs.
Speaking of alternate stereographic effects with everyday objects, I recently discovered that you can get an amazing effect from certain patterns of steel treadplate- The place had a bathroom door covered in shiny treadplate and as I sat there taking care of business I experienced an amazing feeling of infinity and three dimensionality from the reflective diamond pattern as my eyes focused into “the 1000 yard stare”.