Adobe 25510629 - After Effects CS3 Professional, Руководство пользователя

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Creating and assigning sources and virtual sets 73
Because saving clips in Ultra is fast, particularly if you use the GPU Boost feature, you may
find it quicker to render the complete scene multiple times—once with each overlay—and
then use an NLE to cut from one scene to the next. This achieves the same result without
having to create multiple sessions in Ultra and trim the input clip precisely in each session.
Which workflow is faster depends on the speed of the computer, the size of the scene, and
other factors.
If you reposition the overlay in one session, then when you merge an object from the overlay
into the background for another session, you will have to move the object to the same relative
position. Otherwise, the object will appear to move when you cut from one session to the
next. If you left the element in the background when you copied it for an overlay, then you'll
have to reposition the element in the foreground and background for the same session or else
they'll be out of registration.
For more information, see “Positioning insets in custom virtual sets” on page 94 .
Customizing a virtual set
You can modify a virtual set by changing the color, size, orientation, and other parameters in
Ultra, or you can use an image-editing application to redesign any or all of an image.
In Point: 0:10.01
Out Point: 0:20.00
In Point: 0:20.01
Out Point: 0:40.00
Trim times Overlay Composited shot