Mark Frauenfelder: This has been going around for a couple of days, but I just found out about it. It's a neat optical effect -- you stare at a color negative of a photo for 30 seconds (or even just 15), then move the mouse over the photo, keeping your eyes on the black dot. The photo appears in color, until you move your eyes.
Saturday, June 10, 2006
Big Spanish Castle (cool illusion)
Mark Frauenfelder: This has been going around for a couple of days, but I just found out about it. It's a neat optical effect -- you stare at a color negative of a photo for 30 seconds (or even just 15), then move the mouse over the photo, keeping your eyes on the black dot. The photo appears in color, until you move your eyes.
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