Motion & Time
- »Stepping feet« illusion 1 – strong, beautiful and (relatively) easy to understand
- Motion Induced Blindness – an unexplained optical illusion of disappearing dots
- Stereokinetic Phenomenon – an optical illusion of 3D from motion (aka »kinetic depth effect«)
- »Rotating Snake« Illusion – with a new explanatory twist
- Snake ad lib – optimising this motion illusion
- Pinna-Brelstaff Illusion
- Motion Aftereffect – also known as »waterfall effect«
- Spiral Motion Aftereffect – more effective for some
- Roget's Palisade Illusion
- Spoke Illusion – a motion illusion + an unexpected (?) aftereffect
- Wagon-wheel effect – closely related to stroboscopic artifacts
- Stroboscopic Artifacts – making a teaching point out of a nuisance
- Sigma Motion – an optical illusion due to an interaction of image dynamics and eye movements
- Eye Jitter – more on eye movements, involuntary ones
- Biological Motion – for me the most beautiful class of visual illusions
- Flash-lag Effect – moving and stationary objects perceived at different times
- Ramp Aftereffect – an aftereffect in time
- Enigma by Isia Leviant
- Freezing Rotation Illusion – a “Best Illusion of the Year” winner
- Reverse Phi Motion – something for the specialist
- »Stepping feet« illusion 2 – radial version of »Stepping feet 1«, weaker
- Motion-Bounce Illusion – sound influencing perception of motion (crossmodally)
- Motion Binding
- Missing-fundamental motion inversion
- Frequency-doubling illusion
- »Kaleidoscope Motion« Illusion
Luminance & Contrast
- Hermann’s Grid – fleeting luminance illusions
- Hermann’s Grid bent – a new twist, refuting the classical explanation
- Scintillating Grid – strong fleeting luminance illusions
- Induced grating – classical brightness contrast
- Craik-O’Brien-Cornsweet – collaboration of retina & cortex
- Wertheimer-Koffka-Ring – pitting Gestalt vs. lateral inhibition
- Simultaneous Contrast – here dynamic
- Pyramid Illusion – Vasarely revealed
- Munker-White Illusion – contrary to lateral inhibition
- Adelson’s »Corrugated Plaid« – context affecting brightness
- Adelson’s »Checker Shadow« illusion – more context affecting brightness
- Contrast Constancy – demonstrating space-average-based contrast gain control
- Contrast Gain Control – demonstrating temporal contrast gain control
- Lazy Shadow – Interaction of luminance & time
- Visual Acuity ↔ Hyperacuity
Colour
- »Lilac Chaser« – a rapid aftereffect, colours move which aren't really there
- Benham’s Top – colour from spatio-temporal patterns
- Neon Colour Spreading
- Structure from motion – fails at equiluminance
- Gestalt loss in equilumance
Geometric- & Angle Illusions
- Hering Illusion – and other angular interactions
- Poggendorff Illusion – a classical geometric optical illusion with a new twist
- Fraser’s Spiral
- »Café Wall« Illusion
- Triangle Puzzle – a puzzle, but an illusion too
Space, 3D & Size Constancy
- Müller-Lyer Illusion – test your bisection accuracy
- Moon illusion
- T-illusion
- Sine Illusion
- Luminance Looming
- Shepard’s “Turning the Tables”
- Shepard’s “Subterranean Terror”
- Missing Corner Cube – a cube with multiple ambiguities
- Ambiguous Sillouette Illusion
- Frankfurter Illusion – binocular rivalry & supression
Cognitive- / Gestalt Effects
- Blur & picture content – spatial filtering (or high frequency masking)
- Hidden message – blur & figure-ground discrimination
- Kanizsa’s Triangle – depends on context
- Blotted letters – Gestalt completion
- Hidden Figures – Dalmatian Dog with 2 helpers
- Hidden Bird – more camouflage
- Rotation – changes the interpretation
- Impossible Objects – draw your own impossible object
- Hallucii – An “impossible” Movie
Specialties with faces
- Rotating face mask – hollow faces
- Find the Face (in the Beans) – a picture puzzle
- The face on Mars – imaginations of perception
- The »Thatcher Illusion« – inverted faces lose their emotional message
- »Ghostly Gaze« Illusion
- Dr. Angry and Mr. Smile – two messages in two spatial frequency bands
- The Lincoln Effect
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