Few mystery movies are as entrancing as Weir’s eerie ‘Picnic,’ a moody picture whose secret is never solved. This was always the intention—the filmmaker often felt like the traditional “whodunit” film always suffered in its reveal—but he also realized that the lack of clarity may also be a let down. Therefore, he decided to craft the most atmospheric picture possible, searching for bizarre methods to cause audience discomfort. “I went to great lengths with the soundtracks, I put a slowed down volcanic eruption that were barely audible, even if on a good sound system you would feel some uneasiness, and I felt that way you would find it a satisfying experience.”
Peter Weir Shunned Stanley Kubrick... (indieWIRE).