Do you remember one of our first posts, and probably the most famous optical illusion of all time? Back then we called it “Colored Squares Illusion“, not knowing true history behind it. Investigating a little, I found out that it was originally called “Checkershadow Illusion” and that this famous optical illusions was created way back in 1995 by Edward H. Adelson, who is working as Professor of Vision Science on MIT University. Today I bring you new version of the same effect, which looks more real-life, even though it was probably digitally created as well. In short: color of the A square on this chess board exactly matches color of the square B. Use Adobe Photoshop (or any other image editing tool) to prove this yourself! What is your opinion on this? Because of the color depth, it’s difficult to follow the directions given to prove the illusion, so I added another simple animation which shows you what happens when you reverse colors. An animated .gif has less color depth, and same letters are used for both examples. The letters, the orb and it’s shadow are the only elements which don’t reverse colors.