Have you used KeyLight recently? Its built into Ae now and I rarely need to make any adjustments anymore unless the source material is bad.
I have used the method you mentioned as well and it is good but when I read your description I thought you described some issues with it, thats the only reason I mentioned Keylight.
Original Message:
Sent: 07-16-2025 06:02
From: Alejandro Galvan
Subject: How to create an inverted alpha mask?
When I said I would like to see easier playback controls, I meant in the Material when someone imports a clip. Right-clicking inside the Scene Director works, too, but only if you're dropping that clip inside the Scene Director. I've used loops where I don't have to drop it into a Scene Director timeline.
Key lights is good. I used to use Dojo BG Remover better back in the day. Worked much better than Key lights. But Dojo only removes either white or black. key lights is any color but then you have play with the sliders to make sure you get a clean key.
The new way (using a black and white clip) is better and easier than key lights because you literally only have duplicate your clip in your timeline, make sure modes is on, and tell your higher clip that the bottom is ur track matte click on the box next to it which switches between Luma and Alpha key n done. Super easy.
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Alejandro Galvan
LA36 LOS ANGELES TV ACCESS
Original Message:
Sent: 07-16-2025 05:02
From: Simon Redmile
Subject: How to create an inverted alpha mask?
All you need to do in After effects is use Keylight effect, select the colour want to remove and remove it.
In XPression, to reverse a video just right-click reverse.
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Simon Redmile
Senior Graphic Programmer & Designer
Ross Video
Bristol United Kingdom
Original Message:
Sent: 07-16-2025 04:33
From: Alejandro Galvan
Subject: How to create an inverted alpha mask?
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Alejandro Galvan
LA36 LOS ANGELES TV ACCESS
Original Message:
Sent: 07-10-2025 07:09
From: Simon Redmile
Subject: How to create an inverted alpha mask?
Screen and darken are for combining layers, screen usualyl to add light effects, darken to adding things like grunge.
For a mask, you need to use alpha mask so the video will need to use a video or image with an alpha.
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Simon Redmile
Senior Graphic Programmer & Designer
Ross Video
Bristol United Kingdom
Original Message:
Sent: 07-10-2025 06:39
From: Alejandro Galvan
Subject: How to create an inverted alpha mask?
Thank you Patrick and Simon for all this inside.
Yes, my video is already converted for Xpression. Yes, the video doesn't have an alpha it's only a B&W video. In Ae we usually change our blending mode to Screen, and it gives us that reveal look with alpha.
@Simon Redmile Your last screenshots are closer to what I am trying to accomplish. Do you have it inside a Layer Object? i'm guessing the green is a Solid quad with a green material, correct?
Here is what I get when I change mine to Darken.
AVI Matte
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Alejandro Galvan
LA36 LOS ANGELES TV ACCESS
Original Message:
Sent: 07-10-2025 06:13
From: Simon Redmile
Subject: How to create an inverted alpha mask?
Surely its not a mask then though its just black?
Video wth darken on.
My video with alpha
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Simon Redmile
Senior Graphic Programmer & Designer
Ross Video
Bristol United Kingdom
Original Message:
Sent: 07-10-2025 05:56
From: Patrick Mirakian
Subject: How to create an inverted alpha mask?
When I use your MATTE video (Xpression codec) and change Blending mode to Darken, it seems to work
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Patrick Mirakian
Director, Manager
Tahiti Nui Television (TNTV)
Original Message:
Sent: 07-10-2025 05:31
From: Alejandro Galvan
Subject: How to create an inverted alpha mask?
I've downloaded and inspected your project but it's not working for what I needed to do. Perhaps it's not possible, as I haven't been able to find any video or article that confirms it's possible. Maybe i'm reaching for something that isn't there.
I am attaching a MATTE video clip for sample use but what I was asked was if I could use different matte animations to reveal a full screen or lower third that I have created already in Xpression.
https://www.dropbox.com/scl/fi/0tg68kl4rgeoofus7qnl9/PBT-1.mov?rlkey=mxo1yfrp0mwme90t7wyo4iolx&dl=0
I tried the different blending modes in each material and then on each Layer Object but no luck.😓
Thank you.
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Alejandro Galvan
LA36 LOS ANGELES TV ACCESS
Original Message:
Sent: 07-09-2025 19:32
From: Patrick Mirakian
Subject: How to create an inverted alpha mask?
Inverted mask.xpp
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Patrick Mirakian
Director, Manager
Tahiti Nui Television (TNTV)
Original Message:
Sent: 07-09-2025 18:47
From: Alejandro Galvan
Subject: How to create an inverted alpha mask?
Could you upload a sample video of your final result?
I've been asked before if we can use animated Matte transitions, but I've never seen a sample of how to. Your sample appears to be precisely that, if I'm not wrong.
Thank You.
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Alejandro Galvan
LA36 LOS ANGELES TV ACCESS
Original Message:
Sent: 07-08-2025 21:21
From: Patrick Mirakian
Subject: How to create an inverted alpha mask?
This is my best method for creating an inverted mask, especially for video material.
Of course, an 'invert' button would make things much easier.
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Patrick Mirakian
Director, Manager
Tahiti Nui Television (TNTV)
Original Message:
Sent: 01-08-2025 10:41
From: Remi G
Subject: How to create an inverted alpha mask?
How do you create an inverted alpha mask or can you use a slab to mask out the material?
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Lea Guerrero
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