Traditionally, rotoscoping has been a tedious and time consuming task of the motion picture industry. Rooted in artificial intelligence, Runway has created an incredible rotoscoping tool called Green Screen to mask and track your video subject for an entire clip within seconds — oftentimes in just one click.
To access the Green Screen tool in Sequel, drag a clip into the timeline and select “Create Mask” under the AI Magic Tools section in the right sidebar. This button will direct you to Green Screen, where you can get going on masking.
Once Green Screen is opened, it's time to create your keyframes. These will be the video frames that anchor your subject to assist with tracking throughout the clip. This tutorial goes through the process a bit more in depth. Happy rotoscoping!