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Multi Layer mask

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ricardo martins
Multi Layer mask
on Jul 30, 2012 at 10:42:09 pm

Hi guys, I was wondering if there`s a practical way to make like 10 layers to be masked by the same mask layer.

Imagine I got a 13 layers in my comp.

1 animated text
1 the mask
10 - footage layers
1 - bg layer

I wanted to mask the 10 footage without masking the bg or the texts, is this possible?


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Dan Fredley
Re: Multi Layer mask
on Jul 31, 2012 at 2:13:15 am

There are several ways to do this.

You can precomp the 10 footage layers together and use the mask as a track matte in the main comp.

If that's not possible you can precomp the mask layer. Duplicate it 10 times and set the track matte for each footage layer. The reason for precomping the mask layer is so that if you need to make changes to the one mask it will ripple through to all of the duplicates.

You can also use expressions to link masks on duplicated mask layers instead of precomping, so whatever works best for you.

You can also precomp the mask layer with the footage and set the blending mode to stencil alpha or silhouette alpha. But make sure you don't collapse transformations or it will cut out the background as well (defeating the purpose of precomping the layers).

I'm sure there are other options, but those are the ones I would try first.

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Darby Edelen
Re: Multi Layer mask
on Jul 31, 2012 at 2:20:42 am

If you want exactly the same mask on all the layers then I'd pre-comp the mask layer, apply a Set Matte effect to the layers you want to mask and point it to the mask pre-comp. The pre-comp does not need to be visible.

Darby Edelen

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