I hope you know what to do with stereograms... cos' here are some called...

StereoBall (=) Screen version: 640x480 pixels (74 Ko) Full version: 1280x960 pixels (363 Ko)

Stereo ‹o› (x) Screen version: 1024x768 pixels (348 Ko) Full version: 1280x1024 pixels (596 Ko)

Stereo SO (x) Screen version: 1024x768 pixels (620 Ko) Full version: 1280x1024 pixels (600 Ko)

Note: “=” focus behind ,“x” cross eyes.