Virtual Production, Extending the output past what is on the LED wall.

HI, I have been testing some Virtual Production and manage to get some Studio time with a LED wall supplier to test it live on a small corner wall + Floor LED setup.

I was wondering what is a good way to mask out the Live capture componate so i can mask the scene and extend it past just whats shown on the LED?

I have setup a green screen VP and you can key out the character and use a garbage mask to extend the scene that way. is it the same concept or is there a better way to do this when you are working with a LED wall?