Much of the production took place in North Carolina, with a couple of location shoots in New York City during the summer of 1989 to capture famous landmark areas, such as Times Square, the Empire State Building, and the Hudson River. Filming in North Carolina took place at the North Carolina Film Studios, where New York rooftop sets were created. Production designer Roy Forge Smith and his art director, Gary Wissner, went to New York City four months prior to filming and took still photographs of rooftops and other various locations. While in NYC, Smith and Wissner were allowed to explore an abandoned Brooklyn subway line, as they could not gain access to a city sewer, but the structure of the subway had the same principle as a sewer. They also went to a water tunnel which had large pipes running through it. After design sketches were created, the construction team used the studios' backlot to create some of the sets. There were problems with the manholes that led to the turtles' home, in that an eight-foot square room had to be constructed beneath them, but found water at about five-feet, and thus had to pour concrete into the underground rooms to keep the water out. In order to make the sewer authentic, a tide-mark was given, and it was covered with brick, plaster and stucco paint to give the walls a realistic look. The turtle costumes were created by Jim Henson's Creature Shop in London. Jim Henson said that the creatures were the most advanced that he had ever worked with. The creatures were first made out of fiberglass, and then remolded out of clay. They were produced as molds to cast the whole body in foam rubber latex. The work at the Creature Shop was completed within 18 weeks. Many major studios, such as Walt Disney Pictures, Columbia Pictures, MGM/UA, Orion Pictures, Paramount (whose parent company Viacom would acquire the TMNT property in 2009), and Warner Bros. turned down the film for distribution; they were worried that despite the popularity of the cartoon and the toy line, the film could potentially be a box office disappointment, like Masters of the Universe was just a couple years prior. The film found distribution roughly halfway through the initial production, via the then small and independent production company New Line Cinema, which had been known for distributing low-budget B movies and