From my limited knowledge, I can't see Giverny, Arlés or the Polynesia being too polluted at the time. Nor can I explain Greco, Bosco or Arcimboldo by eye/mental ailments. Much less Gaudi, Shostakovich, Profokiev, Ezra Pound, Kafka, or works like Dr. Caligari's Cabinet or Un Chien Andalou, or...