Splatter: Architects of Fear (1986)

As an ambitious group of independent filmmakers set out to shoot a movie about a world overrun by ghoulish mutants following a nuclear holocaust, the special effects artists who created the grisly effects for the feature take viewers behind the scenes to show just how they make the murderous mayhem onscreen appear so nauseatingly realistic.
Review: "The golden age of gore films was filled with blood squibs, machetes and intestine pulling. I can't think of a film that better pays homage to those fine days of yesteryear than the film within a film, Splatter Architects of Fear. 1986 brought us many things, but at the height of the slasher genre, no film is more memorable as a forgettable piece of trash than this film here. If you have the means, I highly suggest you seek it out."