Auto-Orientation options

The auto-orientation options (Layer > Transform > Auto-Orient) for each layer specify how its orientation depends on motion paths, points of interest, and cameras.

Off
The layer rotates freely, independent of the motion path, point of interest, or other layers.

Orient Along Path
The layer faces in the direction of the motion path. For example, use this option for a camera to depict the perspective of a driver who is looking at the road ahead while driving.

Orient Towards Camera
The layer is always oriented so that it faces the active camera. This option is available for 3D layers; this option is not available for 2D layers, cameras, or lights.

Orient Towards Point Of Interest
The camera or light always points at its point of interest. This option is not available for layers other than cameras and lights.

Note: If you specify an auto-orientation option for a layer, and then change its Orientation or X, Y, or Z Rotation properties, the layer orientation is offset by the new values. For example, you can set a camera with Orient Along Path, and then rotate the camera 90 degrees to the right to depict the perspective of a passenger looking out the side window of a car as it moves.

The automatic orientation to point to the point of interest occurs before the Rotation and Orientation transformations are applied. To animate a camera or light with the Orient Towards Point Of Interest option to look temporarily away from the point of interest, animate the Rotation and Orientation transform properties.

Dan Ebberts provides an expression on his MotionScript website that auto-orients a layer along only one axis. This is useful, for example, for having characters turn from side to side to follow the camera while remaining upright.