KEY FRAMING TECHNIQUES
There are essentially two ways to go about rotoing a scene: timeline or motion-based key framing. Timeline key framing involves establishing key frames at set intervals within the timeline, without taking into account the motion of the focus object. Motion-based key framing creates key frames based on the movement and direction of the focus object.
5.1 Timeline Key Framing
The setup of this style of roto requires the artist to establish key frames based on the timeline. It’s useful in some cases where the focus object lacks a definable pattern or consistent movement but has a similar shape for the duration of its on-screen existence. More often than not, you’ll find a shot where the focus object hasn’t any consistent, ...