3D in Depth: Cameras | 3
3D in Depth: Cameras
In real-world cameras, the Film Gate is a metal opening that fits over the film. This determines the size and shape where the image will be exposed. In 3D, the film is the rendered plane. The Film Fit is the relationship between the Film Gate and the Resolution Gate. Ideally, these should have the same aspect ratio, but if not, you can adjust them in your application.
This image shows a close relationship between the Film Gate and the Resolution Gate.
A clipping plane is an imaginary plane placed along a camera's sight line. A camera has two of these clipping planes, both near and far. Objects between those clipping planes will be visible in the camera's view. Objects that are closer than the near frame or further away than the far clipping plane will be invisible to the camera. Clipping planes can be useful in excluding parts of a scene.
Camera Usage Tips
Keep all camera movements down to a minimum. If you’re creating a production for the web, constant panning or zooming does not translate well. It is better to tell your story using a series of set shots, instead of multiple zooming and panning. If you are panning, keep the motion slow. Panning too fast can induce nausea in the viewers. In addition, bouncing motions distract the audience and can induce nausea.
Consider your scene elements. If your background is simple, your subject will stand out, but if the background is too busy, the subject will tend to blend in.
Be careful when using MPEG compression. Like the JPEG format, using high settings can introduce artifacts into your animations.
Created: June 5, 2003
Revised: January 8, 2004