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Table Of Contents
539Motion User Guide
QuickTime movies
You can also use QuickTime movies as the image source of a particle cell. For example,
you can create an animation in Motion, render it as a QuickTime movie, then import
it into another Motion project to use as image source for a cell. In general, the same
recommendations for creating still graphics apply to the creation of animation or video
clips you intend to use as cells, but there are additional considerations.
Use the following guidelines when creating animations for use as particles:
• Playback performance: Using a movie clip as the image source of a particle cell may
impact your project’s playback performance.
• Retimed clips: If you retime a movie clip (in the Properties Inspector or with a Retiming
behavior) used as the image source for a particle cell, the effect of the retiming is
carried through to the particle system.
• Looping clips: Particles created from QuickTime clips loop over and over for the
duration of each particle’s life. If the clip you use doesn’t loop well, there will be a
jump cut at every loop point. Another option is to use very short movies to introduce
randomness into the appearance of the particle system.
• Minimal compression: Ideally, QuickTime clips to be used as particles should be saved
using a high-quality codec, such as Animation, Uncompressed 8- and 10-bit 4:2:2, or
ProRes 4444. Other codecs can be used, but they might introduce unwanted artifacts
depending on the level of compression used.
Using filters and masks with particles in Motion
You can apply filters or masks to an emitter. (However, you cannot apply filters or masks to
the cells in an emitter.)
Filters
When you apply a filter to an emitter, the entire particle system is transformed, including
every element in the onscreen pattern.
Note: Although you cannot apply a filter to an individual cell, you can apply a filter to the
image source of a cell (the disabled layer in Layers list used to create the particle cell).
For more information on applying filters to layers in your project, see Intro to filters in
Motion.