3-D folks, Mathematicians, and Artists: Trying to create my own Trompe-l'œil / forced perspective illusionary image to hang on my wall (e.g. the awesome parking garage signage everyone's already seen... more examples here, and here). I'm having trouble faking it with 2-D programs, and the math is puzzling me. [more inside]
posted by jjjjjjjijjjjjjj on Jan 9, 2009 - 34 answers

You've probably seen this toy Jacob's Ladder before. I'm wondering if there are any other illusions that use the same principle, and whether they can be easily recreated by crafty amatuers. [more inside]
posted by maryh on Oct 20, 2007 - 9 answers

This research claims that there aren't any blind schizophrenics. Basically, it says that blindness could protect against schizophrenia, but because of typically later age of onset for blindness (mostly results of glaucoma and macular degenration), I wonder if schizophrenia could somehow protect against blindness. Does anyone have an opinion on this? [more inside]
posted by srs on Nov 3, 2006 - 15 answers

I want to learn magic. [more inside]
posted by spiderwire on Jul 15, 2006 - 10 answers

I'm looking for this optical illusion image. It's the one where you stare at the center of the image for 30 seconds then close your eyes and an after image of the Mona Lisa will magically appear to you. Does anyone have a link to this image? [more inside]
posted by SDAnder on Apr 13, 2006 - 6 answers

At nighttime, close your eyes, then flick them around in your head. Why do you see flashes of bright white halos? [more inside]
posted by wackybrit on Jan 2, 2006 - 10 answers

royalty free optical illusions? [more inside]
posted by ransom on Nov 28, 2005 - 2 answers