PlanetZ forums - scopeusers.com

http://www.johnsadowski.com/big_spanish_castle.html

Stare at the dot for thirty seconds, then move the mouse over the image and keep looking at the dot. The castle appears in colour until you move your eyes - neat trick!

very neat.
seeing is believing, huh?

Neat. Thanks for the link.

best,

john

Spanish Castle Magic ?

Very cool, that's a phenomenon called of "ghost colors" (transl. from italian), similar to that one when you look for a while to a lit lamp bulb then you watch in a different direction and you see a dark ball. But this is very cool and well made. Thanks