Flag Illusion
This illusion really messes with my eyes… it was very difficult to create without puking a little in my mouth.
.
This optical illusion creates the impression that the rows of blue rectangular tiles are tilted, curved, or misaligned, even though the underlying pattern is made up of straight, parallel lines. Many viewers perceive parts of the image as shifting direction or bending, despite the fact that the rows themselves are arranged in a regular geometric structure.
The illusion is caused by the way the visual system interprets contrast, shading, and the positioning of the individual shapes. The gradual color gradients on each tile create depth cues that make some edges appear closer or farther away than others. As the brain processes these local details, it exaggerates small differences in alignment and orientation, leading to the perception of distortion across the entire pattern.
This effect demonstrates that human vision does not measure angles and positions perfectly. Instead, the brain uses shortcuts to quickly interpret complex visual scenes. When repeated patterns contain strong contrasts and carefully arranged elements, these shortcuts can produce errors in perception. As a result, the image appears dynamic and uneven even though its structure is actually orderly and consistent. The illusion highlights how our brains actively construct visual reality rather than simply recording what is present.