8

Material Dynamic Operator 189
If it isn’t, the particles all change color at the
same time.
There’s no need to turn on Show In Viewport;
theParticleAgemapdoesn’tappearinthe
viewports.
9. Render the animation, or a few representative
frames.
As each particle falls, it gradually changes color,
with the oldest particles changing first.
Tip: You needn’t actually delete the part icles
tousethismethod.Thereareseveralwaysto
avoid this. You could set Life Span to a higher
number than the leng t h of the animation, and
then, in the Particle Age map parameters, lower
the Age #2 and Age #3 settings. Or, if you’re
using a local Delete operator, you could use an
Age test (page 2–207) to move the particles into
another event just b efore they’re scheduled to
be deleted. In that case, to avoid an abr upt color
change, you mig ht want to add to subsequent
events a
Material Static operator (page 2–183)
with a material that uses the same final color or
map as the Particle Age map.
Interfa ce
The user interface appears in the parameters panel,
on the right side of the P article View dialog.
Assign Materia l—When on, the op erator assig ns
the specified m aterial (see next p ar ameter) to the
part icles. Default=on.
[button]—Use this button to assig n a material to
the operator. Click the button and then use the
Material/Map Browser to choose the material.
Alternatively , drag the material from a Material
Editor sample slot to the button.
After you assign a material to the operator , its
name appears on the button.