At age seventy, Cunningham became the first choreographer of international renown to create work in dialogue with software technologies, when he was forced to explore the limitations that severe arthritis imposed upon his own freedom of movement. Cunningham's use of the computer has been described as an extension of his interest in integrating vernacular movement into the context of the dance. In CRWDSPCR, dancers aim at exact angles with their arms and feet, changing phrases quickly and methodically, as though transitioning from one keyframe to the next. These movements seem directly influenced by the shapes and rhythms of the LifeForms figures. In a 1994 essay, Cunningham writes of his 1989 introduction to a dance

Rhonda Ryman's Ballet Moves II®
PowerMoves 1&2 Animation Libraries for Mac & Windows“
MeGaMoCap V2 Animation Library for Mac & Windows”
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