The Alpha compositor composites the two images using the alpha channel of the foreground image. The background image appears in areas where the foreground image's alpha channel is transparent.
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Rendering menu > Video Post > Video Post window > Make sure the two child events are in the order you want the Image Layer event to use them. > Select the two events. > Video Post toolbar >
(Add Image Layer Event) > Choose Alpha Compositor from the Layer Plug-in list.
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Rendering menu > Video Post > Video Post window > Select an Alpha Compositor > Video Post toolbar >
(Edit Current Event)
Procedures
To use the Alpha Compositor filters:
- Add two Scene or Image Input events to the queue.
- Select both events and assign an Image Layer event consisting of the Alpha Composite Filter.
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Select the Image Layer event and click Edit Current Event.