• Adobe After Effects

  Multiple Alpha Layer Sequences – how?

  Posted by Adam Leonardi on September 21, 2011 at 9:23 am

  Hey guys, I have multiple rendered 2d alpha maps, I wish to use two or more of these sequences to block parts of my “LUX Comp” so the light only falls in certain places.

  It works fine with one, I have the Lux in a COMP1, then above this I have my alpha sequence and on the COMP1 I have “Luma inverted Matt” selected for the alpha drop down box. But how can I add a second or third?!

  Cheers
  Adam

  Roland R. kahlenberg replied 14 years, 11 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Roland R. kahlenberg

  September 21, 2011 at 11:07 am

  Compound Arithmetic should do the trick. Set Operator to Add and Operate on Channels to Alpha. Take note that the Second Source Layer’s visibility should be switched off .

  HTH
  RoRK

  Intensive AE & Mocha Training in Asia.

Reply to this Discussion! Login or Sign Up