Apple Final Cut Pro 6 - Manual (Page 1435)

650 Part IV Real Time and Rendering
There are two advantages to item-level (audio clip item) rendering:
 Item-level rendering reduces the processor demands for audio, leaving more
processing power available for other effects.
 When you move the audio clip item to other tracks or locations in the Timeline, the
clip item does not lose its connection to the render file. This means you don’t have to
rerender the audio clip each time you move it.
The Rendering Process
When you are ready to render, you need to choose render quality settings for your
sequence and decide which segments you want to render.
Controlling Render Quality
By default, render files are created at full quality, but you can speed up rendering by
choosing lower-quality options in the Render Control tab and the Video Processing tab
of the Sequence Settings window. For more information, see “
Changing Render and
Video Processing Settings ” on page 659.
Order of Effects Rendering
When you render effects in a sequence, they’re rendered in the following order:
 The top video track (the highest-numbered track) is rendered first and then
composited onto the track below.
 Within each track, effects are rendered as follows: speed, filters, motion, motion blur,
opacity, and transitions.
You can change the order of rendering by using nested sequences. For more
information, see Volume II, Chapter 23, “Sequence-to-Sequence Editing.”