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Activity Forums Adobe After Effects Compositing two elements into one background.

  • Compositing two elements into one background.

    Posted by Adambl on December 12, 2006 at 10:22 pm

    I have two static shots, they both have the same background. In both shots however there is an actor moving. I want to have both of the actors composited on the mutual background.

    I’m tinkered around with blending modes, but the best effect I could get is them both appearing on screen in about half opacity with ‘screen’

    is there a less complicated way of doing this or do I just have to rotoscope them out manually(I’ve tried this and it’s proving difficult – one of the actors is wearing a chewbacca costume and is quite hairy =D

    Stewart Boyles replied 19 years, 5 months ago 3 Members · 3 Replies
  • 3 Replies
  • Chris Smith

    December 12, 2006 at 11:02 pm

    If the camera was locked off, you don’t need to do an articulate roto, just a garbage mask around one of the two. Unless they overlap then it’s detailed roto time. I did a spot where I had one monkey that had to look like 3 and a loose roto around 2 of them to put them into the 3rd was all it took to make the shot.

    Check out a few threads down there is a new tutorial on rotoing. In it he did the same thing, did a loose garbage matte to put an element elswhere in the same scene. If the BG doesn’t change, you can get away with murder.

    Of course it goes without saying that just shooting blind and trying to fix it later is always going to get you in trouble rather than planning the shot in the first place.

    Chris Smith
    https://www.sugarfilmproduction.com

  • Adambl

    December 13, 2006 at 3:17 am

    They overlap unfortunately.

    Rotoscoping it is, I’m gonna check out a few tutorials first to get it done as fast as possible.

    Thanks for the advice.

    Adam Bloemink
    http://www.adambloeminkproductions.com

  • Stewart Boyles

    December 13, 2006 at 6:42 pm

    from someone who has done a little bit of rotoscoping, I have one suggestion. Export out the clips as a filmstrip or targa/tiff sequence and do the roto in Photoshop. You’ll get a tighter roto and you won’t want to kill your neighbor.

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