All Cameron did was awaken the the sleeping giant that was movies in 3d, something that was introduced back in the 60s I believe. He woke it up and just made it better, nothing pioneered, just improved. It just became the latest thing because of the success of Avatar, which was filmed at Weta. If you want pioneering in movies, then thank the man we all love to hate: George Lucas. He has bought so much to the table in terms of the Digital technology you and I take for granted on a daily basis..its unreal. He really pushed people to do it because of his vision, like the way Steve Jobs did at Apple. I believe he (George Lucas) was also a catalyst in the advent of the dvd player so go figure that LOL. Tin Tin was directed by Steven Spielberg and Produced by Peter Jackson down at Weta.. Mocap...jeez that goes back a while. The earliest I recall was for Terminator 2 for the T1000 character. They essentially just film Robert Patrick with dots on and white underpants at ILM then reprojected the footage thru the PC for the animation process. Similar to how John lasseter did the stained glass Knight in Young Sherlock Holmes back in the late 80s. Also on the making of the original Jurassic Park, theres a bit of footage of legendary stop motion guru Phil Tippett animating the T-Rex Puppet thats linked to the CG one via an electronic armature to the PC....another type of mocap......! But in hindsight motion control cameras were a way of doing 'capture' as you could repeat the process over and over to film separate elements onto film, this was introduced in the modern era by Douglas Trumbull in 2001:A Space Odyssey. May have to Wiki this stuff for more info.... Jay