In this lesson, we start to understand roto, a node for keying, which uses Bezier curves to outline the pattern to be keyed, and adjusts it frame by frame.
What we learned here is that we need to divide a complex whole into several parts roto, because this way we can save a lot of effort when we need to make adjustments.
For example, we divided the running man into several parts, head, hands, torso and legs.
