Adobe 12040118 - After Effects Standard, Tutorial

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anywhere in the layer stacking order, unlike a track matte layer, which must be directly above the matted layer in the layer stacking order. Also,
one layer can be used as the matte for multiple layers with the Set Matte effect. (See Track mattes and traveling mattes.)
Take Matte From Layer The layer to use as the replacement matte.
Use For Matte The channel to use for the matte.
Invert Matte Inverts the transparency values of the matte.
Stretch Matte To Fit Scales the selected layer to match the size of the current layer. If Stretch Matte To Fit is deselected, the layer designated as
the matte is centered in the first layer.
Composite Matte With Original Composites the new matte with the current layer, rather than replacing it. The resulting matte allows the image to
show through only where the current matte and the new matte both have some opacity.
Premultiply Matte Layer Premultiplies the new matte layer with the current layer.
Shift Channels effect
The Shift Channels effect replaces red, green, blue, and alpha channels in the image with values from other channels.
This effect works with 8-bpc, 16-bpc, and 32-bpc color.
Take Channel From The channel to use as a source.
Todd Kopriva provides a post on the Adobe website 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.
Source Opacity The opacity of the source layer.
Color The color of the solid.
Opacity The opacity of the solid.
Blending Mode The blending mode used to combine the layer and the solid color.
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