2009

3 Use Orbit on page 7611 to move the camera until the perspective of

the scene roughly matches that of the still image.

Adjust the camera's perspective on page 7607 to fine-tune the

perspective match.

Use Move on page 959 with the camera or target to position the

scene against the background.

If you raise or lower the camera, raise or lower the target by an equal

amount, in order to keep them level and maintain the horizon.

You can also use the

Camera Match utility on page 5249 to match the

perspective of a camera to a photograph. You will need accurate scene

measurements to do so.

Animating Cameras

You animate a camera by using transforms or changing its creation parameters

in different keyframes while the Set Key or Auto Key button is on. The program

interpolates camera transforms and parameter values between keyframes, as

it does for object geometry.

See

Auto Key Animation Mode on page 7549 and Track View on page 3503 for

further descriptions of animation. This topic summarizes some possibilities

and suggests some techniques.

In general, it’s best to use a

free camera on page 5203 when the camera is to

move within the scene; use a

target camera on page 5205 when camera position

is fixed.

Moving a Camera Along a Path

Having a camera follow a path is a common way to create architectural

walkthroughs, roller coaster rides, and so on.

■ If the camera must bank or tilt close to the vertical (as on a roller coaster),

use a free camera. Assign the

Path constraint on page 3297 directly to the

camera object. The camera follows the path, and you can adjust its point

Using Cameras | 5225