Filmmaker Paul Schrader revealed some of the details of his next project at the New York Film Festival during the Q&A for his beautiful and more optimistic new film, “The Master Gardener.” During the discussion with NYFF’s Dennis Lim and the film’s stars Joel Edgerton and Sigourney Weaver, Schrader said his next film would be about a “trauma nurse working in Puerto Rico.” But as he detailed, in his conversation about “The Master Gardener” and the so-called God’s Lonely Man trilogy that includes “First Reformed” and “The Card Counter,” this vocation, trauma nurse would just be the “occupational metaphor” used to hide what the film is really about.