Colorization Optical Illusion
The picture below will turn into gray scale image after 10seconds of displaying. But if you try to stare at the negetive image long enough, You will be seeing a Colorful butterfly as at the above
Click image to enlarge
The maker; [Optical Illusion Etc] explained on how he made this trick on his site.
Here are afew more illusions on different pictures:
Tags: Colorization, Optical Illusion, Butterfly, Johnsadowski