Video and Key Signal Paths
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Video+Key
In this mode, you can manipulate the key signal with all keyframe parameters,
including motion paths, warps, light sources, and textures, independently of
the video. Note that, since you can move the key channel completely indepen-
dently of the video channel, parts of the video channel that do not overlap the
key channel are not visible. For this reason, select both channels when moving
the image in this mode, unless this effect is what you want.
Video-Key+Shadow
This mode splits the B channel in two. The key part moves with the main video
channel (A), with a horizontal position control for the key signal. You can
manipulate the shadow, which is derived from the key input, with the B chan-
nel, completely independently of the video/key. All keyframe parameters,
including motion paths, warps, light sources, and textures, apply to the shadow
channel.
