LINUX space photography

In order to create computer-generated characters with photo-realistic degree, Cameron developed a new motion capture animation technology; The development work took 14 months and was not completed until 2006 12.

Technological innovations include: a new system to illuminate a large area (such as Pandora jungle), a motion capture studio six times larger than the previous similar studios, and an improved facial expression capture method, which can achieve complete performance capture. In order to capture the face, the actors will each wear a cap with a small camera, and the camera will face the actor's face; Information such as facial expressions and eye movements collected by the camera will be transmitted to the computer.

According to Cameron, this method can copy the actor's body movements to his digital body, exactly the same. While transmitting the data captured by the performance directly to the computer, there are also many reference cameras shooting from different angles, which provide digital artists with performance pictures from various angles.

Richard Bain Hamm, the animator of this film, mentioned a scene that posed a unique challenge to its members. He said: "At the end of the film, there is a scene where Jack is picked up by Nitelli. In the last picture, Jack is human and Nitelli is a Na 'vi. They interact. It's not easy for real characters to have actual contact with CG characters. We spent a lot of energy looking for points that cast the right amount of shadows, including reflected light from human characters to the skin of Nami people. "

Extended data:

The film special effects of Avatar are produced by Vita Digital Company in Wellington, New Zealand, which once hired 900 people to work for the film. In order to render Avatar, Vita Digital used a server farm covering an area of 65,438+00,000 square feet, including 4,000 HP servers and 35,000 processor cores running Ubuntu? Linux system and use cluster management software grid engine.

In the ranking of the world's top 500 supercomputers in June 5438+065438+ 10, 2009, the rendering server group ranked from 193 to 197. When creating the fictional world of Na 'vi and Pandora, the space for storing their data exceeded1Pb; ; In the last movie of Avatar, a one-minute clip takes up 17.28GB of storage space.

In order to ensure the completion of special effects production on time, many other companies participated in the production: for example, Industrial Light Magic and Vita Digital created a battle scene together. In this film, Industrial Light Magic is responsible for the visual effects of most special vehicles, and it also invented a new method to make CGI explosion effects. Joe letteri is the visual effects director of this film.

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