Checker Shadow Illusion
Incredibly, both A and B are the same shade of grey. These type of optical illusions usually just use simple contrast to fool the brain, but this illusion employs two effects. First of all, it plays tricks on the mind thanks to the dark shadow contrast around B - but the effect is reinforced by the bright white background contrast near A.
With some 'training', it is possible to see both A and B as the same shade, but otherwise you might want to import the picture into a paint package to prove it to yourself.
For more optical illusions like this, visit his Rotating Illusions page.
Watch your very world around you distort!
Improved over time, this ranks as one of the more scary optical illusions. There are anims to make everything shrink, grow, and both!
For this stunning illusion, you'll need to have flash installed, but in all probability, you most likely already have. Otherwise, you may download the standard "Microsoft Video 1" AVI versions here (20k zipped), but then you'll need to follow the instructions in the blue box-out to the right.
INSTRUCTIONS: After clicking on the box of your choice, sit up fairly close to the monitor screen and stare into the center of the animation for a minute or 2 (the longer the better). Once you've done this, look at something else, and your vision will go haywire! Things will really look as though they're shrinking or growing!
You think those are cool? On top of other new illusions, we have 6 more types of stretch, including: SHRINK! SQUASH! THIN FACE! FAT FACE! and MOTOR-WAY! Click here for more info...
Enjoy those? You ain't seen nothing yet...
We didn't just churn them out of course. Many of the illusions went through several stages to see which variation worked 'best'. For example, the 'Starstruck Horizon' went through about 20-30 different designs before we decided on the final version/s.
The recommended donation price was $3, but due to the low number of donations, the page as of 01/02/2010 is now completely free.