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Activity Forums Adobe After Effects Need help with noobie masking issue

  • Need help with noobie masking issue

    Posted by Joel Appugliese on December 11, 2008 at 12:47 pm

    Hi everyone. I’m not very familiar with compositing so this is probably a noob question. I created a 3d fly-through of a Hotel room for a client. He decided that he wanted the cupboards to be a different color, so I rendered out 3 seperate tga sequences of the cupboard’s alpha channel ( 3 seperate sequences for the frames where the cupboards were in camera). My goal was to render out only the alpha channel as an image to save time, then in After Effects, use these sequences as a mask for color correcting the cupboards.
    I can’t, however, figure out how to do that. My image is a .tga. The Black and white are in the RGB Channels, rather than the Alpha Channel.
    Can anyone help me?

    Don Sciore replied 17 years, 5 months ago 2 Members · 1 Reply
  • 1 Reply
  • Don Sciore

    December 11, 2008 at 4:04 pm

    Just use the white layer as a “luma matte” to get your transparency.

    Good Luck
    Don

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