Cut out, auto shape

You can add multiple shape masks to define multiple areas, and you can also animate the shapes with keyframes so that they follow a moving object, or follow an area while a camera pans. For information about animating shape masks

Hello, yes please post an image. I'm not getting the "sketal" term. Can you tell what you mean?
All my best,
Martin

It seems to me what what you want to do is create paths for different area of an image.  You will  be able to stroke those paths onto and empty layer like a line drawing like in a coloring book.  You use this stroked drawing many ways in a composit, Blend it, use it in a mask, use it as an overlay

Do you mean an outline?