Inspiring

Question

effect only to MASKED PART

Forum|Forum|6 years ago
April 27, 2020
3 replies
1564 views

hello in my clip i want to apply an fx only to a part which is delimited by a mask

let's say the half upper part, i want to apply it there

how can i do that?

thanks

How to

This topic has been closed for replies.

R

Rick Gerard

Community Expert

Draw your mask on the layer with the effect. Spin down the effect properties in the Timeline. At the bottom of the Effect Properties, you will see Compositing Options. Click + and choose the appropriate mask. Here's Gradient Fill applied to a Blue Solid with a feathered elliptical mask.

I use this technique all the time for everything from Color Grading on specific objects using multiple copies of Lumetri to limiting the visibility of particle effects:

Compositing_Options.zip

thepixelsmith

Community Expert

In the Timeline, when you open up an effect there is a group of properties named Compositing Options that allow you to mask an effect.

1: Create your mask and add the effect as normal.

2: In the Timeline open the effect's properties to reveal Compositing Options.

3: Click on the + sign to add a mask. If you have more than one mask you will have to choose which mask to use.

patrickh27764550

Inspiring

What it looks like I needed to do was turn off the layer below the layer with the masks. I guess the mask doesn't recognize the subtrcted hole if the layer below has content.

It's still rendering now, so we'll see what happens.

thepixelsmith

Community Expert

That is correct. Like I said it looks for transparent areas in the composition to fill.

R

RobShultz

Community Expert

Have two layers of the same video in your timeline. Have the masked layer on top and apply the effect to the top layeer.

stefanocpsAuthor

Inspiring

great!

thanks

patrickh27764550

Inspiring

Bringing this thread back to life...

I tried exactly that, however I get the following message:

"After Effects warning: All target frames are completely opaque (no holes to fill). The Content-Aware Fill layer generation for Comp (Comp Name) has been aborted."

This is wrong, my top layer has some masks that have been subtracted.

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