• Adobe After Effects

  Changing shape mask

  Posted by Jim Bachalo on May 17, 2013 at 2:52 am

  Need some expert advice as to the best method of approaching this masking problem where the mask changes shape as the shot changes perspective.

  In the following low res render I need to separate the building from the sky but the building changes perspective as the camera pans down.

  https://vimeo.com/66372643
  pw 1dc

  Can this be done all within AE, or do I need some 3rd party masking tool?
  The original is 4K.
  Thanks for any tips or suggestions.

  Local is the new global

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  Ridley Walker replied 13 years, 2 months ago 3 Members · 4 Replies
• 4 Replies

• 

  Chris Brett

  May 17, 2013 at 9:59 am

  Hi Jim

  ————— if you are simply changing the sky then I reckon its worth trying a luma key / chroma key which I reckon will do most of it then you will just need to fiddle with the left hand corner a bit…..

  ——————————————— chris —
• 

  Ridley Walker

  May 17, 2013 at 3:10 pm

  Have you tried animating the mask shape?

  The shot doesn’t look to difficult to rotoscope in After Effects.

  Or use Mocha, see:https://library.creativecow.net/devis_andrew/AE_Rotoscoping-Mocha/1
• 

  Jim Bachalo

  May 17, 2013 at 7:12 pm

  Thanks! As a first step will try keying. If that doesn’t do the trick will give rotoscoping a try!

  Local is the new global
• 

  Ridley Walker

  May 17, 2013 at 8:38 pm

  Say hi to Rob Ford 😉

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