Avatar: Fire and Ash Behind the Camera discusses the philosophy and technical aspects of 3D filmmaking.
Key points discussed in the video include:
- How 3D works: 3D presentation uses two 2D images, one for each eye, which the brain then combines into a stereoscopic view. This applies to both live-action photography and CG-rendered scenes.
- Camera setup for live-action 3D: It requires two cameras, similar to human vision, with the distance between their lenses needing to dynamically adjust. This is achieved using a beam splitter rig, which allows the cameras to move closer together and “toe in” or converge, mimicking how human eyes focus.
- Evolution of 3D technology: Director James Cameron mentions starting with two cameras bolted side-by-side in 2000, then progressing to more sophisticated beam splitter rigs, smaller cameras and lenses, and robotic servo systems for precise camera movement.
- The “sweet spot” of 3D: The goal is to create immersive 3D that draws the viewer in and makes them feel physically present, without being a gimmick that constantly pokes the eye. It’s considered an art form and a technical procedure, like the spatial design of a movie.
- 3D as part of the experience: Ultimately, 3D is seen as an integral part of the world-building and overall cinematic experience, akin to color, lighting, scope, and scale, rather than the sole reason people go to a movie.
