I developed these sketches originally as motion graphics commissioned by IDEO, for displaying on Interactive Cube, a 4-meter display in Vodafone Portugual's headquarters.

Here I reduced the colors to grayscale, to focus more on the effects of visual illusion.

• Cafe Wall: a well-known illusion first described by Richard Gregory in 1973. Here the illusion becomes a wave-like animation, whose magnitude changes depending on the cursor position.

• Rectangles: A grid of rotating rectangles within rectangles creates a glittering effect.

• Disc: An animation of twisting radial lines generates a rather hypnotic pattern.

Probably not suitable for people who may suffer vertigo and seizure.

— 2003. 03. 17