Long-lasting color fringing!
Black Dots - White Dots
Colours - Words
Apricot hunt
Elephant Legs
Horizontal (?) Lines
Concentric - Contrary
Stare at the center +!
The center squares have identical brightness!
Click for a thorough treatise on
Lightness Perception and Lightness Illusions.
Stare at the spinning dancer.
Which way is she turning?
Look away, look back, she's going the other way!