Solid composite effect – Adobe After Effects User Manual
Page 480

Take Channel From
Source Opacity
Color
Opacity
Blending Mode
The channel to use as a source.
Todd Kopriva provides a post on the
that describes the use of the Remove Color Matting and Shift Channels effects to remove
black backgrounds from images.
Solid Composite effect
The Solid Composite effect offers a quick way to create a composite of a new color solid behind the original source layer.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
The opacity of the source layer.
The color of the solid.
The opacity of the solid.
The blending mode used to combine the layer and the solid color.
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