Rotoscoping is the event of pressing the mask tool (G), and creating a mask around the given target (for example: a man is shooting someone in an action scene, and the editor is creating mask around the person with the pen tool). If a layer is behind the layer your masking out (rotoscoping), it will then become its own layer on top of its predecessor. This task can be performed on all versions of After Effects.
- The keyboard shortcut for the pen tool is 'G'.
- If you click and drag over your target with the pen tool, you can bend the line being produced, thus making rotoscoping much simpler with round objects in the project.