T-1000 played Kyle Reese in "The Terminator", in the role with the explanation that Skynet managed to acquire Reese's DNA and use it for a new Terminator. Cameron ultimately dropped this idea after deciding the audience would find it too confusing: eventually casting came down to Robert Patrick, as a deliberate contrast to the original Terminator - Cameron stated "I wanted to find someone who would be a good contrast to Arnold. If the 800 series is a kind of human Panzer tank, then the 1000 series had to be a Porsche." For a more machine-like performance, Patrick had to learn
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