Illusions

- XLogo

xlogo

These programs create visual optical illusions. Some are famous, others I've just come across by experimenting.

You can of course use XLogo to alter the features of each illusion, and discover even stranger and stronger distortions.

After Image
Negative color appearance.

Assimilation
Color blending.

Bulge
Bulging grid.

Cafe Wall
Distorted tile pattern.

Circles
Relative shape sizes.

Color Names
Left right brain confusion.

Fraser Illusion
Twisted vertical lines.

Grid
Distorted square grid.

Hermann Grid
Intersecting dark spots.

Hexagon
Distorted figure.

Intertwine
Intertwined concentric circles.

Kanizsa
Illusory floating triangle shape.

Marbles
Op art distortion.

Negative Circles
Floating shapes.

Neon
Square patch of color.

Orbinson
Distorted square.

Revolve
Two revolving rings.

Scintillate
Scintillating tile pattern.

Seaweed
Waving tile pattern illusion.

Segments
Similar segment shapes.

Sine
Sine wave illusion.

Spiral
Concentric circle spirals.

Tube
Continuous swaying motion.

Twisted Cord
Vertical cords appear to bend.

Wave
Continuous wave motion.

White's Illusion
Gray rectangles appear different colors behind bars.

ZigZag
Distorted lines.

Zollner
Distorted horizontal lines in tiled grid.

Zoom
Continuous zoom motion.

Bulge
Bulge