Adjacent to John Waters: Pope of Trash, in the Warner Bros. Gallery, the Academy Museum presents Outside the Mainstream, an installation that pays homage to the work of other radically independent filmmakers—such as Kenneth Anger, Shirley Clarke, Jack Smith, Andy Warhol, Gregg Araki, Todd Haynes, and Rose Troche—who operate beyond the pale of mainstream cinema. The gallery focuses on examples from the American avant-garde, underground film, and New Queer Cinema movements, united by how forward-thinking film journalists including Jonas Mekas…