Two years ago, in September 2008, the iconic modern choreographer Merce Cunningham staged one of his last spectacles: “Ocean,” at the bottom of a granite quarry in Waite Park, Minn. (For a reminder go here.)

Opinions on the landmark production were mixed. Performed during a rainy weekend, some of the shows were cancelled midway through. The dramatic setting was all but invisible in the dark, until a light show at the end, prompting the question: Why all the hype about the quarry? This could have been performed anywhere outside in the round.

Some of the dancers were too old to perform Cunningham’s rigorous choreography; some appeared too young. On more than one dancer, their shiny leotards hung, baggy, on their tiny bodies. At times, however, Cunningham’s abstract movement was mesmerizing in its efficiency, evocatively conjuring images, emotions and ideas singular to each viewer’s heart and mind.

Also present at the performances was one of Cunningham’s long-time collaborators, the filmmaker Charles Atlas. Over the decades — Cunningham passed away in July 2009 — Atlas has documented the choreographer’s work and his innovations in dance on film with profound effects. On Wednesday, Atlas premieres his film of “Ocean” at the Walker Art Center. The screening is also a benefit for the Cunningham Dance Foundation's Legacy Plan.

"Ocean." 7 p.m. Wednesday, Sept. 15. Walker Cinema, Walker Art Center, Minneapolis. Tickets $30. 612-375-7600.