This illusion is catching flame to be quite interesting.  As our beloved illusion contributor, Akiyoshi Kitaoka has shared on his Twitter.

Analyzing these turtle shapes in depth gives my eyes and brain a tease.  See if we draw the attention to the shapes, they are all the same.  However, it is the color of every alternating one that is giving the illusion of this bend or curved pattern.

Kitaoka flipped the color and contrast of this piece without the lightness and it is another version of this illusion.

Some users are debating that they see dark-gray turtles and light-gray ones because they are NOT the same luminance.  if averaged over the area — though they do have identical luminance at their center points.  However, it is confirmed that the texture is axis-aligned and the colors are indeed the same.

Mondays tend to be slow and groggy around here.  Especially when there is so much work to catch up with.

Today, I have a shout out to Professor Akiyoshi KITAOKA for his work with illusions made by new technology.  3D printers.  How many of us here would think of all the neat things you could print out just by designing it and putting it into production?  Check this out.

OK, I lied.  This is not the work of a 3D printer.  Seems to be the work of carefully designed printed flat.  It’s the illusion of this irregular square or box seemly floating or popping out of the background.  You can check out more of Professor Kitaoka’s work .  He has created tons of neat stuff.

We also love it when readers send us photos or illusions work they have created.  Send them in and we’ll gladly feature it.