Tilted mortar
Cafe Wall
Parallel rows look slanted when offset tiles are separated by bright mortar lines.
Perception studies
Optical illusions built from code.
A gallery of visual experiments where still lines seem to bend, static patterns appear to move, and simple geometry refuses to behave.
Peripheral ghosts
Hermann Grid
Dark smudges seem to appear at intersections until you look directly at them.
False rotation
Rotating Snakes
Uneven contrast steps make circular bands feel like they are turning.
Impossible object
Penrose Triangle
Each corner reads locally, but the full structure cannot exist in ordinary space.
Interference
Moire Field
Two fine stripe systems collide and create larger waves that are not actually drawn.
Flat depth
Tunnel Grid
Repeating rectangles and alternating color suggest depth on a flat surface.