I'm pretty new to after effects and am trying to use it for a project. My goal is to attach an image to my blue screen at the corners so that it can warp according to how the blue screen is moved. Essentially some one is putting a blue screen square onto a wall and then I am zooming in to the image(keeping the full image within the blue screen expanding with the zoom). How would I go about anchoring the image to the blue screen so it can warp this way?
It sounds like a job for Mocha, which you should have with AE. Unless, of course, something gets in the way of the blue screen, even if it's momentary. You'll need to undertake some brief chroma keying on a duplicated layer in that case.