I've never understood this picture. Is the joke that there is no optical illusion? I have never seen anything else than all of the plates being right side up.
It works for me. The shaded inside of the indent is interpreted as the shaded side of a hill.
I was convinced it was a gif and I was blinking during the transition until I read this
I've never understood this picture. Is the joke that there is no optical illusion? I have never seen anything else than all of the plates being right side up.
It works for me. The shaded inside of the indent is interpreted as the shaded side of a hill.
I was convinced it was a gif and I was blinking during the transition until I read this