Producer Dino De Laurentiis was very unhappy with the werewolf used in the film. He was disappointed in both the way it looked and the way the costumed actor moved. This proved to be a bit of an insult to the actor wearing the suit as he was an accomplished modern dancer and was hired specifically for his movement skills.
The werewolf dream sequence utilized a total of seventy extras that were divided up into four groups with various levels of make-up and costume. These ranged from approximately ten principal actors used for close-ups and action shots, having the most refined looks, while the remainders were just made to appear menacing and fill up the rest of the church to give it a full house appearance.
Complete construction of the werewolf costume took three months. After finalization of the shape and design, using three-dimensional clay heads, the entire costume was made of foam and polyurethane and was covered with actual bear hair. The head of the costume was mechanically operated by six people from a distance of up to thirty feet away.
The Coslaw residence was an actual home used in Wilmington, North Carolina. Though the interiors were a set on a sound stage, the actual home itself was relocated in the 1990s to another area in town due to a massive shopping center that was built in it's place.