By Lisa Schwarzbaum
Updated November 29, 2006 at 05:00 AM EST

The most intriguing moments in Absolute Wilson, Katharina Otto-Bernstein’s surprisingly square portrait of avant-garde artist and director Robert Wilson, aren’t the snippets of such famous Wilsonian theatrical fantasias as Einstein on the Beach or The Black Rider; the funky archival footage; or the interview with the late Wilson booster Susan Sontag. Rather, they are the reminiscences by the Waco-born Wilson himself, who appears as controlled as a lacquered Texas matron while recalling the looming father who disapproved of his son’s art, his homosexuality — his essence, it seems.