Op Art

Knitty shows how to make this cool optical illusion baby quilt. Here
"Optical Art is a method of painting concerning the interaction between illusion and picture plane, between understanding and seeing." [John Lancaster. Introducing Op Art, London: BT Batsford Ltd, 1973, p. 28.] The Op Art movement of the 1960s played with perspective in very simple shapes, taking advantage of the way that the brain interprets images. The art they produced created optical illusions, making the flat surface of a painting appear to bend and twist. Black and white were especially popular in this movement, as the high contrast helped make the illusions more convincing."