Autostereogram

http://en.wikipedia.org/wiki/File:Stereogram_Tut_Simple.png

http://en.wikipedia.org/wiki/File:Stereogram_Tut_Highlight.png

http://en.wikipedia.org/wiki/File:Stereogram_Tut_Random_Dot_Shark.png

http://en.wikipedia.org/wiki/File:Stereogram_Tut_Shark.png

http://en.wikipedia.org/wiki/File:Stereogram_Tut_Animated_Shark.gif

http://en.wikipedia.org/wiki/File:Chess_Single_Image_Stereogram_by_3Dimka.jpg

http://en.wikipedia.org/wiki/File:Stereogram_Tut_Shark_Bottom_Clear.png

http://www.michaelray-von.com/goldenmoment.html

http://www.michaelray-von.com/snowshow.html

http://www.netaxs.com/~mhmyers/rdsjpgs/crease.jpg

http://aa-project.sourceforge.net/aa3d/

http://en.wikipedia.org/wiki/Autostereogram