Question: Which film director, Frank Pierson or Peter Tscherkassky, primarily used a darkroom rather than digital film to produce their works?

Related documents: [0]  [DOC] Peter Tscherkassky (born October 3, 1958) is an Austrian avant-garde filmmaker who works primarily with found footage. All of his work is done with film and heavily edited in the darkroom, rather than relying on recent advances in digital film. [END] 
[1]  [DOC] Frank Romer Pierson (May 12, 1925 – July 22, 2012) was an American screenwriter and film director. [END]  
Answer: Peter Tscherkassky
Peter Tscherkassky