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pre rendering in after effects

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mathew lisett
pre rendering in after effects
on Jun 1, 2010 at 12:15:09 am

hi guys, im trying to understand something.

with the pre render, am i correct in thinking this simply renders the footage and replaces the new footage into the prject. so that you are then workign with the new footage and can then correctly apply other filters without looking a mess?

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Todd Kopriva
Re: pre rendering in after effects
on Jun 1, 2010 at 11:28:49 am

Yes, pre-rendering takes a nested composition, renders it, and replaces the nested composition in a composition with the rendered movie.

The value of pre-rendering is that you render an item once rather than forcing After Effects to render and re-render it every time that the item is used.

from the Help document:
"A complex nested composition can take a long time to render, either for previews or for final output. If you have a nested composition that you do not expect to work on further, you can save time during each rendering operation by pre-rendering the nested composition into a movie and replacing the composition with the rendered movie. You can still modify the original nested composition, because it remains in the Project panel. If you make a significant change to the original nested composition, just render it again. Pre-rendering a nested composition is especially beneficial when you will use it multiple times in a project."

Todd Kopriva, Adobe Systems Incorporated
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