Professor Richard Gregory visited the Cafe Wall in February 2010. Closer view.
Turning all rows of dark "bricks' into light "bricks"
Turning alternating rows of dark "bricks' into light "bricks"
Best Illusion of The Year Contest 2017 Second prize, by Victoria Skye, USA
Skye Blue Café Wall Illusion
Do the dark blue rows appear to slant? Surprise! They are completely straight and in parallel rows. The rows appear to skew due to the contrasts and variants in light and color as well as the varying angles of the diamond targets at the intersections. Blurring the image dissipates the illusion by dissolving the contrasts and angles.
The horizontal lines are parallel & straight.Note: This image is similar to a type of Perspective illusion: Hering illusion
The illusion found with side-by-side replicas of an image of a receding object applies also to a single object, as in this figure. The figure is drawn with parallel sides, yet the impression is of an object that becomes fatter with distance.Note: This image is associated with a type of Leaning tower illusion