Cross Eyed Illusion, Tutorial here: photoextremist.com/2010…

Tutorial here: photoextremist.com/2010/03/cross-eyes-illusion/

Cross-eye-3d

Cross-eye-3d

Master Beyts - Nice Optical Illusion [SHARE] Just Follow The Instructions : There are two guide dots near the top. Cross your eyes to overlap them and see three. You will see

Autostereogram - Wikipedia

How to Create a Stereoscopic Image for Crossed Eye Image Viewing

Cross your eyes until the two images create a single image in the middle, and then focus on it. It should appear 3D : r/blackmagicfuckery

Cross-Eyed Stereogram Gallery : Stereogram Images, Games, Video and Software. All Free!

Cross-eye-3d

20 Cross-Eyed 3D ideas cross eyed, optical illusions, magic eye pictures