There’s so much JPEG artifacting in the original. All of it, and I mean all of it, could have been avoided, at much smaller file size, by setting tile size to 16 instead of 15.
Color variations in white tiles, it seems. When you look close, the brain compares shades of white to the neighboring black. When you look far away, brain focuses on larger patterns.
Here’s another example. Look at this grating from several feet away.
Recovered image
There’s so much JPEG artifacting in the original. All of it, and I mean all of it, could have been avoided, at much smaller file size, by setting tile size to 16 instead of 15.
How does it work?
Color variations in white tiles, it seems. When you look close, the brain compares shades of white to the neighboring black. When you look far away, brain focuses on larger patterns.
that’s what it is, I’ve made over before. basically grayscale image faintly on a black and white pattern, doesn’t need to be checkerboard.
Magnets, maybe.
Spray a little water on it and the illusion stops working, so yeah it must be magnets.