Optical Illusion (Trompe l'oeil)
Introduction
The trompe-l'œil (from "trap before the eye",[1] from the French trompe-l'œil, "deceives the eye") is a pictorial technique that attempts to deceive the eye by playing with the architectural environment (real or simulated), perspective, shading and other optical effects of feigning, achieving an "intensified reality" or "substitution of reality".[2] The term is also used for reference. «illusionism»[3] (not to be confused with the performing art of that name, which also plays with illusion).
Trompe l'oeils are usually wall paintings of accentuated realism designed with a perspective such that, viewed from a certain point of view, they make the viewer believe that the background is projected beyond the wall or ceiling (quadratura, di sotto in sù[4]) or that the figures protrude from it. They can be interior (representing furniture, windows, doors or other more complex scenes) or exterior (taking advantage of the large surface of a party wall or the wall spaces between real openings). Smaller trompe-l'oeils are also abundant, some painted or inlaid on furniture or simulating them (trompe-l'oeils called "cabinet" - cabinet -, "cupboard" - cupboard - or "armourer's trompe-l'oeil" - especially on tabletops from which apparently all types of objects hang (playing cards arranged for a game, fake stamps with bent corners attached to a board with points or pins - which can be included in the genre of the «painting within the painting")»— etc.).[5].
Still lifes or still lifes [6] were, over the centuries, a genre in which painters particularly resorted to the use of trompe l'oeil. Essential works of the Renaissance apply this effect, such as the Chamber of the Spouses[7] by Andrea Mantegna, the Flemish grisailles,[8] the Florentine cenacoli or the pala di San Zaccaria by Giovanni Bellini. The same occurs with many Baroque works: Las Meninas by Velázquez was exhibited for many years in the Prado Museum in such a way that the viewer was made to "enter" the painting with the help of a mirror and the real lighting of the room through a window arranged identically to those of the Alcázar represented on the right side of the painting.[9] In contemporary painting, the surrealists (especially Dalí and Magritte) and the hyperrealists have used the trompe l'oeil frequently.
The literary sources of Pliny the Elder and Vitruvius that collect data on ancient Greek painting speak of trompe-l'oeil in it: for example, Parrhasius considered himself superior to Zeuxis for having managed to deceive his rival with a painted curtain that he tried to draw back by taking it for real, while the grapes painted by Zeuxis had only managed to deceive the birds that tried to eat them, he also painted (around 468-458 BC) a realistic curtain on a decoration for a tragedy by Aeschylus, which sparked an intellectual debate.[10] The use of the curtain (or the hinge, or the frame itself "Frame (furniture)") or the superimposition of small elements that could be taken as foreign to the painting (such as a fly) are characteristic ways of provoking an illusionistic effect in trompe-l'oeil.[5].