Editing Scene graph (section)

===PHIGS===
[[PHIGS]] was the first commercial scene graph specification, and became an [[ANSI standard]] in 1988. Disparate implementations were provided by [[Unix]] hardware vendors. The [[HOOPS 3D Graphics System]] appears to have been the first commercial scene graph library provided by a single software vendor. It was designed to run on disparate lower-level 2D and 3D interfaces, with the first major production version (v3.0) completed in 1991.