It makes you appreciate what he pulls off that much more.

Yet the house has flourished under the direction of a short list of famed designers, the most recent, Belgian-born designer Raf Simons. His primary months at the design house are the subject of the film “Dior and I,” which chronicles the creation of Simons’ first collection for the haute couture in July 2012. The film, directed by Frederic Tcheng, is opening the Tribeca FIlm Festival on Thursday, April 17 while simultaneously making its world premiere.