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Forums Adobe After Effects How can you create a mask that affects other layers in the composition?

  • How can you create a mask that affects other layers in the composition?

  • Daniel Haskett

    April 1, 2005 at 2:39 pm

    Hi there

    Ive been trying to get my head around track mattes, or at least thats what i think i have to do? Basically I want to create a mask that can affect multiple layers…so it masks out lots of layers. Hmmm…..I tried putting a mask on an adjustment layer but that didnt work. If anyone can help me with this Id really appreciate it! Im struggling with it a bit at the moment and I really need to know how!



  • Angus Mackay

    April 1, 2005 at 2:54 pm

    Hi Dan,

    1.why don’t you pre-comp the layers you want to mask?. If you pre-comp (moving attributes to a new comp) you can then happily mask all the layers that you want to as one. If you need to modify the layers within your mask at a later stage just open up the pre comp and tweek them there.

    2.Or you can nest your present comp inside another comp’ and then apply the mask to them there, working this way still gives you your original comp to tweek if reqired.

    The second technique will preserve any tranfer modes you may be using so if thats relevant then go for number two.



  • Haze

    April 1, 2005 at 4:13 pm

    search the AE help files for ‘Stencil Alpha”.

  • Daniel Haskett

    April 1, 2005 at 11:46 pm

    Wow! Thanks for the help, that stencil alpha thing is great, you’ve helped me a lot, its so easy 🙂



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