Director and editor Robert Greene continues to intriguingly blur the lines between fact, fiction and filmmaking in his new hybrid feature, Too Much Sugar, which premiered in Venice’s Orizzonti sidebar. Like his precedent efforts, Bisbee ’17 and Procession, Greene’s latest is an exercise in collaborative directing that employs real people to both be themselves and perform in movie-like reenactments, creating a unique form of cine-therapy that has become the indie auteur’s trademark. Here, he turns the camera on a pair of friends from the tiny rural enclave of Moberly, Missouri, revealing working-class men marked by euphoria and…