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Activity Forums Apple Motion How about using a black and white image as a matte?

  • How about using a black and white image as a matte?

    Posted by Matt Devino on August 26, 2007 at 7:16 pm

    I have a black and white image from an output of a key. How do I apply that another clip as an alpha for it to use?

    Burt Hazard replied 18 years, 8 months ago 3 Members · 2 Replies
  • 2 Replies
  • Doyle Rockwell

    August 26, 2007 at 9:09 pm

    Heya,

    You can use an image mask to accomplish this. It defaults to using the alpha channel of the reference image, but you can just as easily set it to use the luminance: Image Mask.

  • Burt Hazard

    August 27, 2007 at 1:53 pm

    You could try this:

    Group- Normal
    Black & White Image- Stencil Luma

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