 VistaVision cameras installed with motion control technology were used for the photography of the live-action scenes which would be composited with animation. Rubber mannequins of Roger Rabbit, Baby Herman and the Weasels would portray the animated characters during rehearsals in order to teach the actors where to look when acting with "open air and imaginative cartoon characters". Many of the live-action props held by cartoon characters were shot on set with either robotic arms holding the props or the props were manipulated by strings, similar to a marionette. The voice of Roger, Charles Fleischer, insisted on wearing a Roger Rabbit costume while on the set, in order to get into character. Filming began on December 2, 1986, and lasted for seven months at Elstree Studios, with an additional month in Los Angeles and at Industrial Light & Magic (ILM) for blue screen effects of Toontown. The entrance of Desilu Studios served as the fictional Maroon Cartoon Studio lot.
