Create an alpha channel for any image or video shot on a black background. This tool is extremely useful for compositing footage of fire, smoke, water and more.
Drag the uni.Unmult effect onto your layer with a black background. By default Unmult will detect the black areas of the layer and turn them into a transparent alpha channel. Place the layer over the background of your choosing in your timeline to see the composited results.
Modify the Effect
You may uncheck the Unmult Checkbox to revert the layer’s black areas back into opaque pixels.
Invert will invert the results of the alpha channel.
Tolerance can be changed to adjust the edges of the alpha.
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