Optical illusion There are a variety of different types of optical illusions. Many are included in the following list. Artists who have worked with optical illusions include M. C. Escher, Bridget Riley, Salvador Dalí, Giuseppe Arcimboldo, Patrick Bokanowski, Marcel Duchamp, Jasper Johns, Oscar Reutersvärd, Victor Vasarely and Charles Allan Gilbert. Contemporary artists who have experimented with illusions include Jonty Hurwitz, Sandro del Prete, Octavio Ocampo, Dick Termes, Shigeo Fukuda, Patrick Hughes, István Orosz, Rob Gonsalves, Gianni A. Sarcone, Ben Heine and Akiyoshi Kitaoka. Optical illusion is also used in film by the technique of forced perspective. Op art is a style of
Art of Illusion development from SourceForge to GitHub and the SourceForge-site serves as the software's discussion forum and delivery channel. Since 1999 there have been over 40 releases of the software. The latest stable version, 3.0.3, was released in December 2016 and the latest 'nightly' version in late August 2017. Art of Illusion consists of the core software and various feature extensions, which come as plugins and scripts. The core software package contains basic modelling, texturing, animation and rendering tools. Scripts are used either to create and edit objects or to modify behavior of the software. Plugins can add features, like tools and