
1) Deceptive decorating devices 2) Painting technique
Found on
https://www.crosswordclues.com/clue/illusionism
[art] Illusionism in art history means either the artistic tradition in which artists create a work of art that appears to share the physical space with the viewer or more broadly the attempt to represent physical appearances precisely – also called mimesis. The term realist may be used in this sense, but that also has rather different me...
Found on
http://en.wikipedia.org/wiki/Illusionism_(art)
[philosophy] Illusionism is a metaphysical theory first propounded by professor Saul Smilansky of the University of Haifa. It holds that people have illusory beliefs about free will.{sfn|Kane|2011|p=26} Furthermore, it holds that it is both of key importance and morally right that people not be disabused of these beliefs, because the illusi...
Found on
http://en.wikipedia.org/wiki/Illusionism_(philosophy)

belief that the external world is philosophy
Found on
http://phrontistery.info/i.html

In art, the two-dimensional representation of a subject in such a way that it seems to exist as a real object in three dimensions. Techniques include the careful use of perspective and shading. A...
Found on
http://www.encyclo.co.uk/local/20688

It is a thin, transparent glaze of color used in oil painting. This glaze is applied to the surface over a drawing. Sometimes called a veil; it goes directly on the white surface.
Found on
http://www.latinart.com/glossary.cfm?sort=I

a philosophy that holds that there is no material world but rather a collection of illusions formed by human consciousness that results in an environment for all humans to live in.
Found on
http://www.translationdirectory.com/glossaries/glossary131.htm

illusionism 1. The doctrine stating that the material world is an immaterial product of the senses. 2. The use of illusionary devices and techniques in art or decoration
Found on
http://www.wordinfo.info/words/index/info/view_unit/1214/3

In Baroque art refers particularly to decorative schemes in buildings, especially ceiling paintings, in which the artist uses perspective and foreshortening to create, for example, the illusion that the ceiling is open sky populated by groups of figures such as saints, angels or whatever. Such effects are also sometimes referred to as trompe l'oeil...
Found on
https://www.encyclo.co.uk/local/20873

The view that the spatial-temporal external world is merely a veil of maya, a phantasmagoria. Not only is everything illusion, deception, appearance, but existence itself has no real value. (Schopenhauer.) -- H.H.
Found on
https://www.encyclo.co.uk/local/21203

In art, the two-dimensional representation of a subject in such a way that it seems to exist as a real object in three dimensions. Techniques include the careful use of perspective and shading. A form of illusionism is the trompe l'oeil picture; another is in baroque art where pictorial space was made an extension of real space. Baroque...
Found on
https://www.encyclo.co.uk/local/21221

a technique of using pictorial methods in order to deceive the eye. Cf. trompe l'oeil. · a theory or doctrine that the material world is an illusion.
Found on
https://www.infoplease.com/dictionary/illusionism
No exact match found.