2009

The user interface appears in the parameters panel, on the right side of the
Particle View dialog.
In the context of Spawn, a parent is the original particle from which new
particles are spawned.
Spawn Rate And Amount group
Use these settings to specify how often particles are to spawn, the measurement
system to use, and other values related to how many particles are spawned.
Once Particles spawn one time only. For each existing particle, one new one
is born.
Delete Parent When on, deletes each original particle from which a new one
is spawned. Available only with the Once option.
Per Second Lets you specify a number of particles to spawn every second. For
example, if you use the default Rate setting of 10.0, at 30 fps a new particle is
born every three frames.
Rate The number of particles to spawn per second. Available only with the
Per Second option.
By Travel Distance Lets you spawn new particles at regular intervals over the
path of a moving parent particle.
Step Size The system spawns a new particle every time the parent moves this
distance, in system units.
Spawnable The percentage of particles in the current event that will spawn
new particles. This is determined once for each particle, when it enters the
event. However, the parameter is animatable. Default=100.0.
For values other than 100.0, Spawnable uses a randomized selection process,
which is affected by the Uniqueness Seed value. For example, with five parent
particles, Offspring #=1, and Spawnable=80.0, you might get any number of
spawned particles between two and five. The average per spawning would be
four, however.
Offspring # The number of new particles the system creates from each parent
particle for each spawning event. Default=1.
Variation The amount by which the Offspring # value can vary randomly.
Default=0.0.
To obtain the actual test value for each particle, the system multiplies the
Variation value by a random number between -1.0 and 1.0, and then applies
the result as a percentage of the Offspring # setting. For example, if Offspring
Particle Flow | 2993