regarded Leatherface as having an intellectual disability and having never learned to speak properly. To research his character in preparation for his role, Hansen visited a special needs school and watched how the students moved and spoke. John Larroquette performed the narration in the opening credits where he was paid in marijuana. Filming The primary filming location was an early 1900s farmhouse located on Quick Hill Road near Round Rock, Texas, where the La Frontera development is now located. The small budget and concerns over high-cost equipment rentals meant the crew filmed seven days a week, up to 16 hours a day. The environment was humid and the cast and crew found conditions tough; temperatures peaked at 110°F (43 °C) on July 26. Hansen later recalled, "It was 95, 100 degrees every day during filming. They wouldn't wash my costume because they were worried that the laundry might lose it, or that it would change color. They didn't have enough money for a second costume. So I wore that [mask] 12 to 16 hours a day, seven days a week, for a month." The Texas Chain Saw Massacre was mainly shot using an Eclair NPR 16mm camera with fine-grain, low-speed film that required four times more light than modern digital cameras. Most of the filming took place in the farmhouse, which was filled with furniture constructed from animal bones and a latex material used as upholstery to give the appearance of human skin. The house was not cooled, and there was little ventilation. The crew covered its walls with drops of animal blood obtained from a local slaughterhouse. Art director Robert A. Burns drove around the countryside and collected the remains of cattle and other animals in various stages of decomposition, with which he littered the floors of the house. The special effects were simple and limited by the budget. The on-screen blood was real in some cases, such as the scene in which Leatherface feeds "Grandpa". The crew had difficulty getting the stage blood to come out of its tube, so instead Burns's index finger was cut with a razor. Burns's costume was so drenched with stage blood that it was "virtually solid" by the last day of shooting. The scene in which Leatherface dismembers Kirk with a chainsaw worried actor William Vail (Kirk). After telling Vail to stay still lest he really be killed, Hansen brought the running