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'Creating Mask on a Shape Layer'

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Jason Ke'Creating Mask on a Shape Layer'
by on Oct 6, 2016 at 9:42:54 am

Hi everyone,

I came across a problem when I have a picture that I want to hide behind inside part of my background footage.

It works well for me when i try to use a solid layer and create a mask on it, then apply alpha track matte to my picture.

but when i try the same method for shape layer (i.e i create a mask on my shape layer and the apply track matte), it doesn't work out well.

I tried the other way to tackle the problem:
Apply a set matte effect to my masked shape layer. It can't work as well.

Your help will be highly appreciated.
Thank you.

Jiaze


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Roei TzorefRe: 'Creating Mask on a Shape Layer'
by on Oct 6, 2016 at 10:00:19 am

I am not sure why in this case you need a mask on top of a shape, instead of using just the shape but if you want to add a mask on a shape look in the tools panel as your shape is selected and you will see a small icon that when it's turned on, the path tools will draw a mask instead of a shape.

Roei Tzoref
After Effects Artist & Instructor
♫ Ae Blues Tutorials


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Jason KeRe: 'Creating Mask on a Shape Layer'
by on Oct 6, 2016 at 8:56:04 pm

Hi,

Thank your for your reply.

I know how to draw a mask on shape layer.

The question is if I want to show a picture underneath the masked shape layer (turned the visibility off and then apply alpha track matte to it), It can't work like the case when using a mask solid layer.

Thanks again.
Jiaze


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Dave LaRondeRe: 'Creating Mask on a Shape Layer'
by on Oct 6, 2016 at 2:31:09 pm

Well, what's wrong with using a solid? You already said it works. I'd say you're done.

Dave LaRonde
Promotion Producer
KGAN (CBS) & KFXA (Fox) Cedar Rapids, IA


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Jason KeRe: 'Creating Mask on a Shape Layer'
by on Oct 6, 2016 at 8:52:29 pm

Thanks for your reply.

I know I am done. But curiosity brought me here.

Why it can't work for the masked shape layer?

The attached picture is the case I achieved using solid layer.

Thank you
Jiaze


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Jason KeRe: 'Creating Mask on a Shape Layer'
by on Oct 6, 2016 at 8:53:30 pm

10654_201610066.46.32.jpg.zip


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Roei TzorefRe: 'Creating Mask on a Shape Layer'
by on Oct 6, 2016 at 9:12:07 pm

This should work. Please drag and drop here a screenshot of what happens when you use a shape with a mask as a track matte.

Roei Tzoref
After Effects Artist & Instructor
♫ Ae Blues Tutorials


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Jason KeRe: 'Creating Mask on a Shape Layer'
by on Oct 6, 2016 at 9:56:24 pm

Thanks!

I have figured it out (I need to use a solid shape layer).

Another question is:
How to apply set matte effect?


(When I set the second layer as a track matte, it works well)


(When I apply a set matte effect to the second layer, it cant work. I wanna achieve a track matte effect like below)

Thanks again for your help!
Jiaze


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Roei TzorefRe: 'Creating Mask on a Shape Layer'
by on Oct 7, 2016 at 8:45:44 am
Last Edited By Roei Tzoref on Oct 7, 2016 at 8:49:34 am

A solid layer is one thing, a shape layer is another. A mask on a solid can be a track matte. A shape layer can also. A mask on a shape too. If theres is an issue with your masked shape not helping you get a decent alpha channel then you can drag and drop your aep file here and we can look at it.

Set matte is another way of using a matte for masking. It should usually be instead of track matte and not in addition.

You should read here to get a better understanding of how masking and mattes are manipulated in Ae to create alpha channels: https://helpx.adobe.com/after-effects/using/alpha-channels-masks-mattes.htm...

Here is explaination on the set matte effect: https://helpx.adobe.com/after-effects/using/alpha-channels-masks-mattes.htm...

Roei Tzoref
After Effects Artist & Instructor
♫ Ae Blues Tutorials


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