<p>You can use track mattes, you can also go to your first key frame copy the mask and paste it on the solid, this will also work</p>

CC BY-SA 3.0
2013-03-26T01:09:54.367Z
2013-03-26T01:09:54.367Z
Chris James Champeau
<p>Put a layer underneath it and set the lower layer's "TrakMat" to "Alpha Matte".  If you don't see the "TrkMat" dropdown menu to the right of the source name, click the "Toggle Switches/Modes" button at the bottom of the screen.</p>

CC BY-SA 3.0
2013-03-26T00:27:20.867Z
2013-03-26T00:27:20.867Z
Jason Conrad
<p>I'm rather new to AE but I have to do some complicated things for school since we came up with such a hard concept.</p>

<p>I have rotoscoped a part of the main footage, now how can I apply this roto mask (at least that's how I understand roto's function) to a solid layer?</p>

<p>My solid layer is something I painted on and I want it to stay within the bounds of the rotoscoped object.</p>

<p>Any help on this would be great!</p>

<p>Thanks.</p>

<after-effects>
How to assign roto to another layer in After Effects
Ilya Karnaukhov
# How to assign roto to another layer in After Effects

(Asked by: username_0 on 2013-03-25)

I'm rather new to AE but I have to do some complicated things for school since we came up with such a hard concept.

I have rotoscoped a part of the main footage, now how can I apply this roto mask (at least that's how I understand roto's function) to a solid layer?

My solid layer is something I painted on and I want it to stay within the bounds of the rotoscoped object.

Any help on this would be great!

Thanks.

**Tags:** after-effects


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## 2 answers

### Answer by username_2 on 2013-03-26. Score: 2 | Accepted answer

Put a layer underneath it and set the lower layer's "TrakMat" to "Alpha Matte". If you don't see the "TrkMat" dropdown menu to the right of the source name, click the "Toggle Switches/Modes" button at the bottom of the screen.


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### Answer by username_1 on 2013-03-26. Score: 2

You can use track mattes, you can also go to your first key frame copy the mask and paste it on the solid, this will also work


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