T2-3D: Battle Across Time simultaneously at 30 frames per second. Several elements of "T2 3-D: Battle Across Time" have been patented by Universal, including the seat drop effect, the blending of live action and film, the trio of projection screens, and the simulated assault weapons. The film was shot at the abandoned Eagle Mountain iron ore mine, just north of Desert Center in California. The cast and crew from the first two Terminator films returned for the shoot, including Arnold Schwarzenegger as The Terminator, Linda Hamilton as Sarah Connor, Robert Patrick as T-1000, and Edward Furlong as John Connor. To achieve the 3-D effect
Terminator 2: Judgment Day emphasize the disparity between the advanced T-1000 and Schwarzenegger's older T-800 (Cameron characterized the two as "a Porsche" and "a human Panzer tank" respectively). Patrick had previously appeared in the action feature "Die Hard 2", but Furlong had no formal acting experience. Joe Morton was picked to portray Miles Dyson, a Cyberdyne scientist who helped develop the new CPU for the T-800 Terminators. Calling themselves T2 Productions, James and co-producers Stephanie Austin and B.J. Rack rented an office in North Hollywood before starting to assemble the crew for "Terminator 2". Adam Greenberg, who worked on "The Terminator" and "Ghost" (1990),