Cafe Wall illusion
Basic pattern
The gray line appears to tilt down to the left, though it is horizontal.
"Black diamond"
Vertical or horizontal gray lines appear to be distorted.
Copyright A.Kitaoka 1999
"Knitting"
The arrays appear to move.
Copyright A.Kitaoka 2002
"Moving tiles"
The inset appears to move. This figure consists of squares.
Copyright A.Kitaoka 2002
"Fish"
Gray lines are vertical and parallel but appear to tilt alternately. Moreover, fish appear to move vertically.
Copyright A.Kitaoka 2003