Checkershadow Illusion

This is a very powerful optical illusion. The squares marked A and B are the same shade of gray.
Checkershadow Illusion
Don’t believe it? Check the image in Photoshop, or click for proof and an explanation, as well as more illusions by Edward H. Adelson.

13 Responses

  1. Paolo Tonon says:

    Very unbelievable! A good test in Photoshop is create a a square with the gray value and move around the figure to see how perception change.

  2. cheryl says:

    oh my god yea.

  3. duck says:

    beautiful!

  4. Patrick says:

    Wow, this looks really amazing! Unbelievable at first sight though..

  5. Rip says:

    This site is sweet too:

    http://www.gonza.com/

  6. I showed it to my mom. She still doesn’t believe it. Also, I just wanted to thank you for SimpleViewer and PostcardViewer. I use it. Amazing work. Thanks.

  7. Romain NOEL says:

    Amazing, of course. Faster than opening Photoshop to check the shadow illusion, i recommend to use Pixie : free, fast and convenient. I’m using it since years !
    Here it is : http://www.nattyware.com/pixie.html

  8. […] as it may seem, the squares marked A and B are the EXACT same shade of gray. Credit to Airtight Interactive for mentioning it. If you’d like the full explanation, you can find it […]

  9. […] as it may seem, the squares marked A and B are the EXACT same shade of gray. Credit to Airtight Interactive for mentioning it. If you’d like the full explanation, you can find it […]

  10. […] gh explanation here, along with several more illusions, courtesy of Edward H. Adelson. Via Airtight Intervactive.

    About t […]

  11. Foo Flash says:

    To check more image effect, plz visit this site:

    http://web.mit.edu/persci/gaz/main-frameset.html

    And thank you for all of your Flash script (tool).

  12. pascal says:

    C’est vraiment dingue a chaque fois je me fais avoir …l’oeil humain est vraiment une belle usine mais a aussi ses limites

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