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Animate a layer behind a mask?

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Andy TaplinAnimate a layer behind a mask?
by on Sep 3, 2007 at 3:32:06 pm

Hi

I don't know why I'm having trouble with this but it's driving me crazy.

I just want to animate a layer bahind a mask so that the layer moves but the mask stays put. So the mask is like a window through to the layer and the layer moves inside it.

I'm using the pan behind tool to move the layer which is fine but as soon as I try and animate the position over time with a couple of keyframes the mask moves as well.

Any ideas - this should be really easy!


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Andy TaplinRe: Animate a layer behind a mask?
by on Sep 3, 2007 at 3:43:07 pm

OK I figured it out just after I posted.

It looks like you set the mask path keyframes at the same time as the position keyframes and then they kind of cancel each other out!

Still a little obscure for such an obvious thing to want to do...


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Steve RobertsRe: Animate a layer behind a mask?
by on Sep 3, 2007 at 3:55:03 pm

You can also mask a separate layer and use that as a track matte for the animated layer below.


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Andy TaplinRe: Animate a layer behind a mask?
by on Sep 3, 2007 at 4:03:52 pm

Thanks Steve

So mask a solid layer and have it above the animated layer?


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Steve RobertsRe: Animate a layer behind a mask?
by on Sep 3, 2007 at 6:55:56 pm

Yep. Set the upper to be the track matte of the lower. Check the help for that.


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Andy TaplinRe: Animate a layer behind a mask?
by on Sep 4, 2007 at 7:10:33 am

Thanks Steve


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faustfireRe: Animate a layer behind a mask?
by on Dec 12, 2007 at 6:11:22 pm

Old thread, but you can also pre-compose your layer, keeping the mask on the composition, and then animate your layer inside the new composition. Hope that makes sense.


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Andy TaplinRe: Animate a layer behind a mask?
by on Dec 13, 2007 at 9:47:10 am

Thanks, nice to see the old threads still get read.

More than one way to 'skin a cat' in AFX for sure.


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