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
T-X of the T-850 endoskeleton, and fitted with blue running lights rather than the original's red. John Rosengrant later stated that the individual parts of the T-X endoskeleton were hard coated, sanded and polished through machines, resulting in a mathematically perfect model, unlike the endoskeleton in "The Terminator", which was sculpted by hand and lacked symmetry. The T-X is designed to not only terminate humans but also rogue Terminators reprogrammed by the Resistance, an "anti-terminator terminator" as stated by John Connor. It is a composite of the T-800 and T-1000, combining the former's solid endoskeleton covered with the latter's liquid metal