An Old Trick to Make 3D Pics in 2D
This paper is about 2D images.... but 2D images with a very nice and convincing 3D -almost stereoscopic- feel!
How is this trick possible? Basically, you take a few frames from a 2D camera, do some rotoscoping, blur the background a bit, and finally add a couple of white vertical bars. Mix the result in an animated GIF image, ad you are done!
A Whole Lot of Examples
This trick has been applied to more than 20 pictures on this TUMBLR page.
Source: a Wikitree page in Korean language.