Much of the crew was made up of active or recently graduated film students from Oklahoma City University, where Fritz Kiersh was a film professor.
A practical effect alien creature was built for the film's production, but it came in far overdue past schedule and pushed production back. When the effect finally arrived to the film's set, direct Fritz Kiersh thought it looked so awful that he immediately scrapped it and asked for a CGI alien be done in post, saying "it cant look worse than that thing!"