Illusory Contour
The perception that something is missing
Subjective Necker Cube by Drake Bradley & Heywood Petry, 1977 (inverted)
Kanizsa Triangle
Kanizsa Triangle variant
Reification Sphere
"Irregular" type
Illusory Motion
The perception that something is moving
Rotating Snakes by Akiyoshi Kitaoka variant, artist unknown
"The spinning balls illusion"
"Flower" type
Visual Noise
The reality that something is distorted
Noise effect / film grain
Old film reels
White noise / TV static
Shimmering effect / heat haze
Distorted reflection / rippling
Computer display glitch