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Activity Forums Adobe After Effects Surpress color on bottom layer based on edges of top layer?

  • Surpress color on bottom layer based on edges of top layer?

    Posted by Josh Pigford on June 18, 2012 at 8:42 pm

    Here’s a screenshot of the issue:

    In the main photo you can see around the edges there is some green bleeding through.

    What we had were keying cards with tracking marks on them and I ultimately just pulled corner pin data from the tracks and laid footage on top of those.

    But when I turn on motion blur for the top footage, the green from the key card shows through.

    So, is there a way to surpress that green color based just on the overlaying footage since the boundaries of the footage are already set (vs. creating and tracking separate mattes)?

    Dan Fredley replied 13 years, 11 months ago 3 Members · 2 Replies
  • 2 Replies
  • Roland R. kahlenberg

    June 18, 2012 at 9:57 pm

    Remove the MB in this comp. Nest this comp and apply CC Force MB.

    HTH
    RoRK

    Intensive AE & Mocha Training in Singapore and Malaysia
    Adobe ACE/ACI (version 7) & Imagineer Systems Inc Approved Mocha Trainer

  • Dan Fredley

    June 19, 2012 at 3:57 am

    A few other tricks I use to avoid adding motion blur to the entire shot:

    • Make the corner pin a little bigger than the area you want to cover.
    • Corner pin a solid color underneath that matches the frame’s color WITHOUT motion blur–feather the edge to blend in with outer edge. Animate opacity and mask as needed.
    • Use a slightly bigger corner pin solid color underneath that matches the frame’s color WITH motion blur–feather the edge to blend in with outer edge. Animate opacity and mask as needed.
    • Isolate and color correct the green fringe using hue/saturation to be closer to the frame’s color or the image color.
    • Photoshop a whole new picture frame, then corner pin the new frame along with the new photo. Roto out the fingers. Extract shadows/reflections as needed.

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