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Okay, if you are Real Old (like me) you used to go to the movie theater to see these old-format 3D (almost all horror) movies, and when you bought your ticket they'd give you a pair of cardboard cheesy 3D glasses.
They have a fancy technical name: anaglyph glasses, with a red cellophane or plastic lens over your left eye, and a blue (technically cyan) lens over your right eye. Your anaglyph glasses "decoded" red and blue images on the movie screen or in a comic book image for your brain, and thus appeared to let you see the color-prepared 2D image in what fairly successfully seemed like a 3D image.
This complex rotating thingamabob (a mathematical term) is real pretty just as it is, but if you get yourself a pair of anaglyph glasses, your brain will be fooled into seeing an extra dimension to this thingamabob.
The thingamabob, in n or, with your cheesy cardboard anaglyph glasses, (n+1) dimensions, is a production of the wonderful (and FREE!) Knotplot software.
VAMRI (Vleeptron Advanced Mathematics Research Institute) wishes to point out that "Spacehunter: Adventures in the Forbidden Zone," (1983) starring young Molly Ringwald, seems to have been the movie that killed old-style anaglyph 3D. No studio released a 3D movie for decades after that. In the plot, a horrible ancient ugly cyborg monster had a way to live forever by sucking the Youth Essence out of feisty minors like Molly. Totally disgusting, in a way to delight Saturday kiddies matinee audiences.
Hitchcock's "Dial M For Murder" (1954) was shot in anaglyph 3D, but by the time it was released, the 3D fad was over, so it was just released as an ordinary 2D color film. But that's why "Dial M" is filled with screwy weirdly-skewed outsized camera shots (e.g. giant scissors) seemingly flying directly at your eyeballs.
New Format 3D -- the 3D effect in RealD is far superior to old anaglyph 3D, and in its first few years it was clear that a RealD movie draws in twice the audience as the same flick without RealD -- has tickled the crap out of Cahiers du Vleeptron.
We first saw and loved "Journey to the Center of the Earth," a RealD project starring and produced by Brendan Fraser. Swear to god there were scores of pretty blue birds flying out of the screen all over the theater.
But to date, the most wonderful achievement of the new RealD technology is "A Very Harold & Kumar 3D Christmas" (2011), which S.W.M.B.O. grudgingly agreed to see with me at the Multiplex Cine-Odeon 14, but only while wearing a paper bag with eyeholes over her head. (It's the Christmas season, so watch for limited theater showings, maybe midnight cult showings, and GO SEE IT.)
RealD bought an earlier pioneer in 3D movie technology, StereoGraphics, founded by Lenny Lipton, who wrote the lyrics for "Puff the Magic Dragon."