FROM THE OPENING shot to the closing credits, Kelly Reichardt’s new film, Showing Up, centers art, artists, and the creative process, disarming you with how rare that actually is. As Lizzy (Michelle Williams) prepares her ceramic figures for an upcoming show, we enter a world of family dysfunction, professional rivalry, and droll commentary on all of it. Yet, the focus of the film, and even its texture, is artmaking itself. Showing Up may finally provide a long-overdue treatment to what seemed a permanent affliction: the representation of the art world on film.