2009

13 Click the Keep Apart operator, change the Falloff Zone value to 9.0, and
then drag the time slider.
There is no delay, because the animation is still playing back from the
cached data. However, the cached data is now invalid, because you
changed a parameter in the particle system.
14 Click the Cache operator, and in the Manual Update group, click Update.
The software closes Particle View, updates the cache for the active
segment, and then reopens Particle View. The cached data is now accurate.
Other manual update options let you update the cache for the entire
animation or a custom frame range.
As you can see, the Cache operator is quite powerful. When present and
active, by default it overrides recalculation of the particle system, except
when you change any action parameters, whereupon it automatically
updates the cached data. Used appropriately, it can save a good deal of
time in setting up and testing particle systems.
2938 | Chapter 14 Space Warps and Particle Systems