The short script for "Pieces" was written by American exploitation filmmaker Dick Randall and Italian producer Roberto Loyola, credited as "John Shadow". Contrary to popular belief, Joe D'Amato was not involved in this production. It was given to director Juan Piquer Simón by Randall and Steve Minasian, with whom he had worked on previous films. Although the film was set in the United States, specifically in Boston, it was mainly shot in and around Valencia, Spain, home of film director Juan Piquer Simón, though some exterior filming took place in Boston. The shoot lasted four weeks with the cast and crew, and another week went by to film the special effects for an estimated budget of $300,000.