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  2. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    The Hollow-Face illusion is an optical illusion in which the perception of a concave mask of a face appears as a normal convex face. Hybrid image. A Hybrid image is an optical illusion developed at MIT in which an image can be interpreted in one of two different ways depending on viewing distance. Illusory contours.

  3. Penrose triangle - Wikipedia

    en.wikipedia.org/wiki/Penrose_triangle

    The Penrose triangle, also known as the Penrose tribar, the impossible tribar, [1] or the impossible triangle, [2] is a triangular impossible object, an optical illusion consisting of an object which can be depicted in a perspective drawing. It cannot exist as a solid object in ordinary three-dimensional Euclidean space, although its surface ...

  4. Penrose stairs - Wikipedia

    en.wikipedia.org/wiki/Penrose_stairs

    Penrose stairs. The Penrose stairs or Penrose steps, also dubbed the impossible staircase, is an impossible object created by Oscar Reutersvärd in 1937 [1][2][3][4] and later independently discovered and made popular by Lionel Penrose and his son Roger Penrose. [5] A variation on the Penrose triangle, it is a two-dimensional depiction of a ...

  5. Optical illusion - Wikipedia

    en.wikipedia.org/wiki/Optical_illusion

    Optical illusion is also used in film by the technique of forced perspective. Op art is a style of art that uses optical illusions to create an impression of movement, or hidden images and patterns. Trompe-l'œil uses realistic imagery to create the optical illusion that depicted objects exist in three dimensions.

  6. Shepard elephant - Wikipedia

    en.wikipedia.org/wiki/Shepard_elephant

    Shepard first published this optical paradox in his 1990 book Mind Sights (page 79) giving it the name "L'egs-istential Quandary". [2] It is the first entry in his chapter on "Figure-ground impossibilities". The pen-and-ink drawing is based on a dream Shepard had in 1974, and on the pencil sketch he made when he woke up. [2]

  7. Autostereogram - Wikipedia

    en.wikipedia.org/wiki/Autostereogram

    The top and bottom images produce a dent or projection depending on whether viewed with cross- () or wall- () eyed vergence. 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.

  8. Jastrow illusion - Wikipedia

    en.wikipedia.org/wiki/Jastrow_illusion

    The Jastrow illusion is an optical illusion attributed to the Polish-American psychologist Joseph Jastrow. [1] This optical illusion is known under different names: Ring-Segment illusion, Jastrow illusion, Wundt area illusion or Wundt-Jastrow illusion. [2] The illusion also occurs in the real world. The two toy railway tracks pictured are ...

  9. Monument Valley (video game) - Wikipedia

    en.wikipedia.org/wiki/Monument_Valley_(video_game)

    Monument Valley is a puzzle and indie game by Ustwo Games. The player leads the princess Ida through mazes of optical illusions and impossible objects while manipulating the world around her to reach various platforms. Monument Valley was developed over ten months beginning in early 2013 based on concept drawings by company artist Ken Wong.