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In the second example, track two is the child track of track one (the parent track), and the compositing mode of track one is set to Mask. This parent/child relationship was set up by clicking the Make Compositing Child button (
) in the track list for track two. This makes the text in track one act as a mask over track two, allowing the fire to show through the mask (i.e., the text). The region outside of the text is still transparent, but there is nothing below these tracks, so it appears black.
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Make Compositing |
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Child button | Child track | |
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In the third example, a generated media event was added to the track below the first two tracks, which are already paired in a parent/child relationship. The color gradient event in track three shows through the transparent area of the top two paired tracks.
Selecting compositing modes
The Compositing Mode button ( ) determines how the |
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transparency in a video track is generated. Since lower tracks | Click to choose a | ||||||
show through higher tracks, it is the compositing mode of the | compositing mode | ||||||
higher track that determines how much of the lower track shows |
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though. |
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| Note: The compositing mode of the lowest video track is a |
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| special case. Selecting a mode for the lowest track affects its |
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| transparency against a black background. |
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To select a compositing mode, click the Compositing Mode button and choose a mode from the menu that appears, or choose Custom to customize compositing with a
Custom compositing modes are available only in the full version of Vegas software.
CHP. 14 | USING VIDEO FX, COMPOSITING, AND MASKS |