A Matte is a greyscale image which serves as a transparency map, with white areas being opaque and black areas being transparent. The Set Matte effect enables you to use channels from another layer as a matte, to define the transparency of the current layer. This can be particularly useful if you want to use the alpha channel from another layer.
- Source Layer: Choose the layer from which the matte will be obtained.
- Matte Source: Select the channel of the source layer, to use the contents of that channel to generate the matte.
- Red: Uses the red color channel of the source image to define transparency. The higher the red value in each pixel, the more opaque that pixel will be.
- Green: Uses the green color channel of the source image to define transparency. The higher the green value in each pixel, the more opaque that pixel will be.
- Blue: Uses the blue color channel of the source image to define transparency. The higher the blue value in each pixel, the more opaque that pixel will be.
- Alpha: Apples the alpha channel of the source layer directly to the current layer. The current layer will only be visible where the source layer is visible.
- Luminance: Uses the luminance values of the source layer to define transparency. The higher the luminance value for each pixel, the more opaque that pixel will be.
- Hue:
- Lightness: Uses the lightness values of the source layer to define transparency. The lighter a pixel is, the more opaque that pixel will be.
- Saturation: Uses the saturation values of the source layer to define transparency. The more saturated a pixel is, the more opaque that pixel will be.
- Full:
- Off: Disables the effect, turning off the matte. This is primarily useful for toggling the set matte effect on and off over the course of the current layer’s duration.
- Blend: Select how the matte from the source layer is blended with the current layer.
- Add: The source matte is added to the current layer’s matte. All visible areas of the current layer will remain visible, and visible areas of the source matte will also be visible.
- Subtract: The source matte is subtracted from the current layer’s matte. All transparent areas of the current layer will remain transparent, and transparent areas of the source matte will also become transparent.
- Replace: The current layer’s matte will be disregarded, and the source layer’s matte will be used in its place.
- Invert: Reverses the matte, so transparent areas become opaque, and opaque areas become transparent.