Comment This could be a problem... (Score 5, Insightful) 261
Peter Jackson was able to get very good visual effects on the LotR trilogy because he used camera tricks rather than digital editing to achieve the illusion of a world populated by big and little people.
The technique called "foreshortening" was used quite a bit, like when Gandalf first sits with Bilbo and has tea in his kitchen. The actors were there, but the set was arranged and props and actors placed so that Bilbo was farther away from the camera than Gandalf, and therefore appeared little while Gandalf was 'human sized'. Its a simple gimmick and worked great. Using a 3D camera setup may not work with this unless you deliberately went frame by frame and edited the 3D in afterward since shooting it with multiple cameras would cancel out the single-perspective trick of foreshortening.
The technique called "foreshortening" was used quite a bit, like when Gandalf first sits with Bilbo and has tea in his kitchen. The actors were there, but the set was arranged and props and actors placed so that Bilbo was farther away from the camera than Gandalf, and therefore appeared little while Gandalf was 'human sized'. Its a simple gimmick and worked great. Using a 3D camera setup may not work with this unless you deliberately went frame by frame and edited the 3D in afterward since shooting it with multiple cameras would cancel out the single-perspective trick of foreshortening.