Wes Craven, Andrzej Kostenko & Karl Martine – The Evolution of Snuff (1978)
Clarke Fountain, allmovie.com wrote:
Rather than being just another exploitation documentary, designed to re-use footage from unprofitable porn films, this feature explores the social circumstances which gave rise to the legend of the “snuff” film, and the conditions present (in 1976) in the porn film industry in general. Sex performers and all the others involved in making such films are interviewed about their work and why they do it. The filmmaker, himself well-known for making “soft”-porn films, was so incensed by the snuff-film trend that he made this exposé of the hard-core pornography industry. The Evolution of Snuff includes a forward by Roman Polanski, who was experiencing legal difficulties in the U.S. at the time.