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 (character) by the more menacing Austrian-accented voice of one of the developers. One part of the scene shows Candy next to a partially complete endoskeleton, indicating that the Terminators were being developed by humans before Judgment Day. This contradicts information from the first film, where Kyle Reese refers to the Model 101 as "new", replacing the older rubber-skinned 600 series, also seen in "Terminator Salvation" (Although this can be explained due to Judgement Day having been delayed in the second movie, suggesting that humanity was able to come up with some of the ideas that Skynet would have taken longer to