Finished, Composited Scene - Adobe 25510629 - After Effects CS3 Professional User Manual

User guide
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32 bit AVI with Alpha
The clip is in the Output Clips folder, or the path that you set for it. Assign the clip to the
4.
overlay as you would any source.
Proceed with any resizing, repositioning, and so on.
5.
If you're working with a photographic image, a quick way to isolate the image with alpha
all around is to shoot it against a greenscreen and then delete that background in
Photoshop.
If you want to have two or more objects in the foreground, you can put them in a single
image. Be aware, however, that they will move as a unit if you change their size, position,
or orientation.

Finished, composited scene

The following is an example of what the finished, composited scene looks like.
This example illustrates a common problem that ruins the illusion of the composited scene.
The subject's toes are in a position where the overlay does not cover them. You have several
options for remedying the problem:
Include the area within the pink circle as part of the overlay image.
Use the Mask Painter to make that region of the input clip transparent. For more
information, see
"Cropping and spot masking the source clip" on page
Reposition the subject a few pixels to the left. For more information, see
position and scale of a layer plane" on page
Depending on the scene and where the subject walks, you may also be able to use the
Input Cropping controls. For more information, see
on page
84.
92.
"Cropping the edge of a frame"
Creating and assigning sources and virtual sets
83.
"Changing the
71

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