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  2. Geometrical-optical illusions - Wikipedia

    en.wikipedia.org/wiki/Geometrical-optical_illusions

    The widely accepted interpretation of, e.g. the Poggendorff and Hering illusions as manifestation of expansion of acute angles at line intersections, is an example of successful implementation of a "bottom-up," physiological explanation of a geometrical–optical illusion. Ponzo illusion in a purely schematic form and, below, with perspective clues

  3. Illusionistic ceiling painting - Wikipedia

    en.wikipedia.org/wiki/Illusionistic_ceiling_painting

    Illusionistic ceiling painting, which includes the techniques of perspective di sotto in sù and quadratura, is the tradition in Renaissance, Baroque and Rococo art in which trompe-l'œil, perspective tools such as foreshortening, and other spatial effects are used to create the illusion of three-dimensional space on an otherwise two ...

  4. List of optical illusions - Wikipedia

    en.wikipedia.org/wiki/List_of_optical_illusions

    The Hering illusion (1861): When two straight and parallel lines are presented in front of radial background (like the spokes of a bicycle), the lines appear as if they were bowed outwards. Hollow-Face illusion: 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.

  5. Oppel-Kundt illusion - Wikipedia

    en.wikipedia.org/wiki/Oppel-Kundt_illusion

    It is also known as the "filled-space illusion" or the "illusion of interrupted extent". [ 1 ] [ 2 ] Depending on the filling elements used, there is a wide variety of graphic implementations of the Oppel-Kundt illusion, which also differ in the magnitude of the visual distortion effects they cause.

  6. Trompe-l'œil - Wikipedia

    en.wikipedia.org/wiki/Trompe-l'œil

    Ceiling of the Treasure Room of the Archaeological Museum of Ferrara, Italy, painted in 1503–1506. Trompe-l'œil (French for 'deceive the eye'; / t r ɒ m p ˈ l ɔɪ / tromp-LOY; French: [tʁɔ̃p lœj] ⓘ) is an artistic term for the highly realistic optical illusion of three-dimensional space and objects on a two-dimensional surface.

  7. Penrose triangle - Wikipedia

    en.wikipedia.org/wiki/Penrose_triangle

    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.

  8. The optical illusion hidden in the 'Mona Lisa' explained - AOL

    www.aol.com/news/2015-08-22-the-optical-illusion...

    Art historians say Leonardo da Vinci hid an optical illusion in the Mona Lisa's face: she doesn't always appear to be smiling. There's question as to whether it was intentional, but new research ...

  9. 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.