3 Replies Latest reply on Aug 5, 2014 9:53 PM by Todd_Kopriva

    Creating an alpha channel in an odd way ?


      My question is about the functionality of After Effects. I highly doubt it's possible but would like to run it through people who would know. My question may not be clear as I'm not sure how to describe it!



      I'm wondering if I can create an alpha channel using the still background of a shot, as an alternative to green screens and making it easier outdoors without needing crazy lights.

      Here's an example. Say you film yourself using a tripod (so the background is still) walking away from a building and want to add an explosion behind you without masking every frame, would you be able to have it recognize the background using a picture without you in it or a still that has the same lighting, and using that to automatically have it differentiate that background from you thus creating an alpha channel or an automatic mask...