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There is a three-dimensional image within the picture. Try crossing your eyes and then slowly uncrossing them. It takes a little practice, but you should start to see something appearing.

That really worked dude i see something. Woah. Thanks. This is fun ;)

try to see through image, and slowly move away from the screen. you'll know when you'll see it, the image will come forward. I sometimes cross my eyes to get that effect faster lol

Crossing my eyes really worked though lol