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  2. Autostereogram - Wikipedia

    en.wikipedia.org/wiki/Autostereogram

    An autostereogram is a two-dimensional (2D) image that can create the optical illusion of a three-dimensional (3D) scene. Autostereograms use only one image to accomplish the effect while normal stereograms require two. The 3D scene in an autostereogram is often unrecognizable until it is viewed properly, unlike typical stereograms.

  3. Illusory contours - Wikipedia

    en.wikipedia.org/wiki/Illusory_contours

    The Ehrenstein illusion is of a bright disc. Closely related to Kanizsa figures is the Ehrenstein illusion. Instead of employing circles with missing wedges, the Ehrenstein illusion triggers an illusory contour percept via radial line segments. Ehrenstein's discovery was originally contextualized as a modification of the Hermann grid. [3]

  4. Art of Illusion - Wikipedia

    en.wikipedia.org/wiki/Art_of_Illusion

    Art of Illusion is a free software, and open source software package [1] for making 3D graphics. [2] It provides tools for 3D modeling, texture mapping, and 3D rendering still images and animations. Art of Illusion can also export models for 3D printing in the STL file format. [3] [4]

  5. Penrose triangle - Wikipedia

    en.wikipedia.org/wiki/Penrose_triangle

    A 3D-printed version of the Reutersvärd Triangle illusion. M.C. Escher's lithograph Waterfall (1961) depicts a watercourse that flows in a zigzag along the long sides of two elongated Penrose triangles, so that it ends up two stories higher than it began. The resulting waterfall, forming the short sides of both triangles, drives a water wheel.

  6. Zoetrope - Wikipedia

    en.wikipedia.org/wiki/Zoetrope

    A zoetrope is a pre-film animation device that produces the illusion of motion, by displaying a sequence of drawings or photographs showing progressive phases of that motion. A zoetrope is a cylindrical variant of the phénakisticope , an apparatus suggested after the stroboscopic discs were introduced in 1833.

  7. Geometrical-optical illusions - Wikipedia

    en.wikipedia.org/wiki/Geometrical-optical_illusions

    Ponzo illusion in a purely schematic form and, below, with perspective clues. However, almost all geometrical optical illusions have components that are at present not amenable to physiological explanations. [4] The subject, therefore, is a fertile field for propositions based in the disciplines of perception and cognition. [5]

  8. Twelve basic principles of animation - Wikipedia

    en.wikipedia.org/wiki/Twelve_basic_principles_of...

    These are two different approaches to the drawing process. Straight ahead action scenes are animated frame by frame from beginning to end, while "pose to pose" involves starting with drawing key frames, and then filling in the intervals later. [12] "Straight ahead action" creates a more fluid, dynamic illusion of movement, and is better for ...

  9. Op art - Wikipedia

    en.wikipedia.org/wiki/Op_art

    Op art, short for optical art, is a style of visual art that uses optical illusions. [1] Op artworks are abstract, with many better-known pieces created in black and white. Typically, they give the viewer the impression of movement, hidden images, flashing and vibrating patterns, or swelling or warping.