My bro-in-law knows of my interests in the ACW and sent me this email...
Joshua Heineman is obsessed with old stereo cards, those old photographs
from the 19th century that contained two different views of the same subject
to give the illusion of depth. He converts them into pseudo-3D GIF images
that can be seen without glasses, on your monitor. The method is extremely
simple, and while the jerking result may seem silly, surprisingly, it works: