2009

Randomize Age Offset When on, the software varies the difference between
the particle age and the starting material ID at random. The maximum
difference is determined by the Max Offset parameter.
Max Offset The maximum number of frames by which the software can
randomly vary particle age.
Sub-Material Rotoscoping group
These settings let you choose the basis on which the operator changes material
ID assignments when using a compound material such as Multi/Sub-Object,
and specify the rate of change.
Material ID Assigns the same material ID to all particles. Use the numeric
field to set the ID value.
Cycle Assigns each particle a material ID in the range 1 to N, where N=#
Sub-Materials, in increasing sequential order. The first ID assigned is 1, then
2, continuing to increment each by 1 until N; then 1 again, and so on.
Random Assigns each particle a random material ID in the range 1 to N, where
N=# Sub-Materials.
# Sub-Materials The highest ID number assigned to particles using the Cycle
or Random option.
In general, set this to the same number of sub-materials in the Multi/Sub-Object
material. If you set it to a smaller number, the operator will use only that
many sub-materials, starting with the first and counting upward.
NOTE The software automatically sets this value to the number of sub-materials
in the material, once only, the first time you apply the material to the operator.
Any subsequent changes in the material itself, or applying a different material to
the operator, will not change or update the setting.
Rate Per Sec(ond) Sets the number of times per second that the assigned
material ID is incremented. If this value is the same as the rate at which
particles enter the event, then one ID is assigned per particle. If it's lower, then
multiple particles are given the same ID, or if it's higher, then the software
increments the assigned ID faster than 1 per particle.
For instance, if particles enter the event at intervals of 1/60 of a second, and
Per Second=30, then each pair of particles will be assigned the same ID. Or if
particles enter the event at intervals of 1/15 of a second, and Per Second=30,
then the ID is incremented (or changed randomly) twice per particle.
Particle Flow | 2931