Optical Wonderful
Ambiguous & Multistable Images
Images that support two or more valid interpretations at once, where the brain settles on one reading at a time and periodically flips between them.
Ambiguous
Duck-Rabbit Illusion
One outline reads as a duck facing left or a rabbit facing right. Most people can't see both at once, and what you expect to see decides which comes first.
Ambiguous
My Wife and My Mother-in-Law (Old/Young Woman Illusion)
One drawing shows a young woman looking away or an old woman in profile, with the same lines serving both. Labels in the demo help you find the one you're missing.
AmbiguousNecker Cube
A wireframe cube with no shading that the brain reads as two different solid cubes, flipping between them. Which face looks nearer first? Vote in the poll.
AmbiguousRubin's Vase (Face/Vase Illusion)
A vase or two faces in profile, sharing one outline. A slider changes the size of each region so you can feel the balance tip from one to the other.