Although small, it is now powerful enough to create quite complex scenes. IRIT started as a polygonal solid modeler and was originally developed on an IBM PC under MSDOS. Version 2.0 was also ported to X11 and version 3.0 to SGI 4D systems. Version 3.0 also includes quite a few free form curves and surfaces tools. In Version 4.0, the display devices were enhanced, freeform curves and surfaces have further support, functions can be defined, and numerous improvement and optimisations are added.
