《我的妹妹我的爱》中，兄妹之间的乱伦是以18世纪古斯塔夫三世统治时期为背景的，但是看来又好像是受到伊丽莎白时代的剧作家John Ford及其作品《真遗憾她是个娼妓》的启发。

The year is 1961 and Ingmar Bergman is making a movie. While planted on the scene as apprentice to Bergman, Vilgot Sjöman (director, I Am Curious–Yellow, 1967), suggests to Swedish Television that they take the opportunity to record with the acclaimed director. In August, Sjöman and the television crew begin to capture what would become a comprehensive five-part documentary on the making of Winter Light, offering views of script development, set construction and lighting, rehearsals and editing, as well as intimate conversations with Bergman and members of his cast and crew. Footage from the film’s Swedish premiere delivers immediate audience reactions and the critics’ reviews the following day.