8

Cache Operator 195
14.
Click the Cache operator, and in the Manual
Update group, click Update.
ThesoftwareclosesParticleView,updatesthe
cachefortheactivesegment,andthenreopens
Particle View. The cached data is now accurate.
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 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. U sed appropriately , it can save a good
deal of time in setting up and testing particle
systems.
Interfa ce
The user interface appears in the parameters panel,
on the right side of the P article View dialog.
Use At —Caches particle motion when play ing
back in the viewports, or at render time, or both.
Default=Viewport.
Impor tant: Choose the Viewpor t/Render option
only when using the same number of particles in the
viewports and for rendering (see
Quantity Multiplier
group (page 2–133)
). Otherwise, unpredictable results
can occur.
Update—
If you change a parameter in the particle
system, the cached data might become invalid.