<em></em>Director Wim Wenders spent a year working with 3-D experts in preparation for the film.
Credit Donata Wenders
Director Wim Wenders created the 3-D documentary "Pina," in tribute to German choreographer Pina Bausch. When the two met over 20 years ago, they started planning a film that would capture her unique style of modern dance. Bausch died of lunch cancer just days before filming started.