Step 01Launch After Effects and upload the video you want to remove background. It will remove all the dark pixels in your scene in order of brightness. So, if your material needs to have dark elements, you may need to mask certain areas and then key them. Adding levels and curves effects without adjusting anything is recommended.
Step 02In the Portfolio panel, navigate to the Shift Channel effect and drag it to the parts you want to key. You can also use this effect for adjustment layers.
Step 03Change the "Take Alpha From" checkbox to "Luminance" in the shift channels effect, and you can see your shot being keyed out. If not, head to the bottom of the composition panel and enable the "Transparent Grid" option with the toggle on the right.
Step 04Using the level and curve effects, continue adjusting until you're satisfied. You can also try different curves and level variations and choose the one you like best.
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