Learn the core features required to extract a subject from a green screen background in After Effects. Details below...
Patreon: [ Ссылка ]

SETUP
Within the Effects & Presets panel, search for "Key". Look for the following entry...

Animation Presets
Presets
Image - Utilities
Keylight + Key Cleaner + Advanced Spill Suppressor

Drag this entry to the footage which will add 3 effects. These effects can be found and changed within the Effect Controls panel.


EFFECT: KEYLIGHT
Select the eye dropper next to Screen Colour and sample a green near the subject in the video. The majority of the green will likely be removed from the footage at this point.

Change the View dropdown from Intermediate Result to Screen Matte. This is the matte that Keylight is creating with which to mask the footage. Within masks in Adobe products, white reveals while black conceals.

Within the Screen Matte options, raise the Clip Black value until the background is a solid black and no longer contains areas of dark grey. Don't push this value so high that parts of the subject are removed or the subject/background boundary becomes jagged. If some areas can't be made completely black, they can be removed manually later with a mask.

Lower the Clip White value until the subject is a solid white. Don't lower it so far as to create jagged edges at the boundary between the subject and the background.

These are the settings used in the example...
Clip Black: 25
Clip White: 90

Change the View from Screen Matte back to Intermediate Result.


EFFECT: KEY CLEANER
No settings were changed in this example but do not turn off this effect.


EFFECT: ADVANCED SPILL SUPPRESSOR
Turn on this effect within the Effect Controls panel. Doing so should remove any green glow around the subject.


MASK
Sometimes there will be green screen areas that aren't easily removed using the above process. This can be the result of, for example, a green screen that wasn't uniformly lit. With the footage layer selected, choose one of the drawing tools such as the Pen or the Rectangle. Drawing a shape on the footage will create a mask that can remove any of these problem areas.


VIDEO SOURCE
[ Ссылка ]

Thank you to Wolfgang Sauerwald for creating this great piece of video

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