The Advantage of Tweening Between More Than Two Key Frames at a Time
Apart from saving time, when you generate tweens using multiple key frames, camera movement will be smoother than if you tween each pair of Key Frames separately. For example, let’s say you snap three key frames (A, B and C) for the car jump as follows:
FIG X: bad camera flow
If you generate a Tween between camera positions A and B, FrameForge creates the averaged camera position A/B, which is of course exactly halfway between the two starting camera positions and angled halfway between the two starting camera angles. If you then tween between camera positions B and C, the result is again an average (B/C) halfway between the original camera position and angle (B) and the ending position and angle (C).
On the other hand, if you tween between camera positions A and C with B included as a key frame, the program will understand that you’re making a single continuous camera move, and will automatically smooth out the intermediary positions, as shown in the following image.
FIG XI: good camera flowNotice that now the camera now maintains a smooth, steady distance and angle from the object at which it’s pointing--an arc, rather than a series of connected angles.