Kinetic art expressions based on optical and luminous phenomenon as well as painting illusionism. The expression "kinetic art" in this modern form first appeared at the Museum für Gestaltung of Zürich in 1960, and found its major developments in the 1960s. In most European countries, it generally included the form of optical art that mainly makes use of optical illusions, such as op art, represented by Bridget Riley, as well as art based on movement represented by Yacov Agam, Carlos Cruz-Diez, Jesús Rafael Soto, Gregorio Vardanega, or Nicolas Schöffer. From 1961 to 1968, GRAV ("Groupe de Recherche d’Art Visuel") founded by François
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