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Activity Forums Adobe After Effects Mirror a mask

  • Mirror a mask

    Posted by Andrew Wagstaff on October 30, 2012 at 10:11 pm

    I am trying to create the effect of a doorway opening in the sky what i need to do is have two masks the same but on opposite sides on the comp

    is it possible to make one mask then copy and rotate it so it will be the same on the otherside?

    Vishesh Arora replied 13 years, 6 months ago 4 Members · 4 Replies
  • 4 Replies
  • Chris Warren

    October 30, 2012 at 10:45 pm

    double click on the mask you want to flip so you get the transform box around it, then grab one side of the box and drag until you have a mirrored version.

    Hope this works!

    “You are the universe experiencing itself”
    ChrisW
    http://www.azprovideo.com

  • Andrew Wagstaff

    October 30, 2012 at 10:58 pm

    when i drag the mask it either takes the whole mask or reszies a part of the mask

    i need the same mask on the other side

  • Tudor “ted” jelescu

    October 31, 2012 at 7:51 am

    Several ways to do this, depending on how you need to composite the shot. If you need both masks at the same time, you can use Shape Layers. Instead of a mask draw and animate a Shape. Duplicate the Shape Layer and flip the x size (-100%).
    Position the flipped layer.
    Precomp both and use as Track Matte on your footage.

    Tudor “Ted” Jelescu
    Senior VFX Artist

  • Vishesh Arora

    October 31, 2012 at 10:39 am

    Ted has given the best way to do it.

    In such cases, using white solid as matte is the best way.

    Vishesh Arora
    3D and Motion Graphics Artist
    Films Rajendra

    Blog:
    https://digieffects.wordpress.com

    Demo Reel(3D):
    https://www.youtube.com/watch?v=lHPgIJU_BR8

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