The film was considered one of the most ground-breaking projects for Industrial Light & Magic. It was one of the effects house's first forays into digital compositing, as well as the VistaGlide motion control camera system, which enabled them to shoot one of its most complex sequences, in which Fox played three separate characters (Marty Sr., Marty Jr., and Marlene), all of whom interacted with each other. Although such scenes were not new, the VistaGlide allowed, for the first time, a completely dynamic scene in which camera movement could finally be incorporated. The technique was also used in scenes where Fox, Thomas F. Wilson, Christopher Lloyd, and Elisabeth Shue's characters encounter and interact with their counterparts. It also includes a brief moment of computer-generated imagery in a holographic shark used to promote a fictional "Jaws 19", which wound up unaltered from the first test done by ILM's digital department because effects supervisor Ken Ralston "liked the fact that it was all messed up."