Remove background in tracked shot

[eddepet]

Hello,

I have a moving and rotating camera tracked and imported in maya.
Now i want to remove the background all around the shot(sky and distant objects).

What is the best way to make a mask for it so i can composite this in AE.

Thanks in advance.

[thnkr]

You would typically do the rotoscoping in AE or some other compositing app, not in Maya.