at SFlix. Atlas' 2013 film Exchange is based on the 1978 dance piece of the same name by legendary dancer/choreographer Merce Cunningham. Atlas created the newly completed film from never-before-seen footage that he shot in 1978 and that was only recently rediscovered by the Merce Cunningham Trust (MCT). The film captures a performance of Exchange by Cunningham and his company, with costumes and backdrop designed by Jasper Johns and music by David Tudor.