2 Replies Latest reply on Nov 28, 2016 10:45 AM by RLLT

    track matte for effects


      Hi. I have rendered some animation in cinema 4d and have an alpha channel in the passes. I want to use that alpha to create a track matte. I can do that for the image itself but I can't figure out how to use it to constrain an effect to a specific area. So say I have a ball and an alpha channel for it, and I want to adjust the levels on the ball but leave the background as it is. Thanks for the help.