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Forums Adobe After Effects Adding a Glow To BG in on Keyed Footage in AE

  • Adding a Glow To BG in on Keyed Footage in AE

  • Olly Moss

    April 6, 2005 at 4:35 pm

    Hi there,

    I am currently working on a music video which has the band performing behind a green screen. We have keyed out the green screen and now placed an image in the BG where the Green screen was. The image should look like a projected image and needs to bleed onto the foreground, i.e the keyed live action footage.

    Using the compound blur in AE has produced an OK result but it hasn’t as of yet, really bleed enough on the live action footage.

    At the moment we are thinking about using the the alpha from the live action footage to work as a mask, but the problem being is that it still does give the layer we used (a solid/or the original image but bigger) a blured or feather edge when using the compound blur in AE.

    I hope this make sense and that someone out there might know of a way.

    Thanks

    Olly

  • Paul Carlin

    April 8, 2005 at 12:00 am

    >I am currently working on a music video which has the band performing behind a green screen.

    Really, the band was behind the green screen?

    Try using some sort of edge detection (Sapphire and Tinderbox makes one) on the alpha of the foreground footage, blur this edge and use it as a track matte for a glowed/blurred copy of the background.

    You can create a poor man’s edge detector by filling a matte choked copy of the foreground alpha matte with black. Gees, I hope that makes sense to someone else.

  • Olly Moss

    April 8, 2005 at 9:44 am

    sorry, my bad. The band was of course in front of the green screen.

    thanks.

    olly

  • Gary Oberbrunner

    April 8, 2005 at 5:42 pm

    If you have Sapphire Plug-ins, try S_EdgeFlash. That’s exactly what it’s meant for; to bleed a bit of the bg onto the fg to help “sell” the comp.

    — Gary

  • hans van vliet

    April 8, 2005 at 10:47 pm

    I don’t know what version of AE you are using but 6.0 comes with keylight and well, it also has fuctions for doing this in the key itself. you might just need 2, one that cuts the band out perfect and the other one is to control the overlay layer that has the bleed setup. Anyways, hope it works out.

    ..::hunz..

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