9

Cache Operator 199
14.
Click the Cache operator, and in the Manual
Update group, click Update.
ThesoftwareclosesParticleView,updatesthe
cachefortheactivesegment,andthenreopens
Particle View. The cached data is now accurat e.
Other manual update options let you update
the cache for the entire anim ation or a custom
frame range.
As you can see, the Cache opera tor is quite
powerful. When present and active, by default
it overrides recalculation of the particle system,
except when you change any action parameters,
wher eupon it automatically updates the cached
data. U sed appropriately, it can save a good
deal of time in sett ing up and testing particle
systems.
Interfa ce
The user interface appears in the parameters panel,
on the right side of the Particle View dialog.
Use At —Caches particle motion when playing
back in the v iewports, or at render time, or both.
Default=Viewport.
Impor tant: Choose the Viewport/Render option
only when using the same number of particles in the
viewports and for rendering (see Quantity Multiplier
group (page 2–137)). Other wise, unpredictable results
can occur.
Update—
If you change a parameter in the particle
system, the cached data might become invalid.