3D Compositing with Action > Action: The Particle System > Customizing the Particle Stream >
Setting Additional Generator Properties

Additional particle generator controls can be found in the Param2 tab.

Rotation fields
  Displays the orientation for particles that have just been born (spawned).
Rotation Variance fields
  Displays the variation of the rotation of a particle once spawned from the particle generator.
Spin fields
  Displays the value to act as a speed setting to a rotation animated over time. For example, a value of 30 causes a particle to spin 30 degrees per frame around its axis.
Spin Variance fields
  Displays the variation to the Spin channel once particles are spawned from the particle generator.
Colour V field
  Displays the variation of the colour of each particle based on the colour set in the Diffuse colour bar (Particle Geometry menu). The variance is expressed as a percentage. Colour Variance works with surfaces or geometries.
Use Seed button
  Enable to override the particle’s seed (useful if you want to change the position of each particle in the particle stream).
Seed field
  Displays the random seed value for the particle stream properties.
TailSize field
  Displays the width of a particle's tail. TailSize is expressed as a percentage:

- At 100%, the tail is the same width as the head.
- At 200%, the tail is twice as wide as the head.

TailSize only works with quad and cone particle types.

TailSize Variance field
  Displays the variation of the TailSize value (as a percentage).
Mass field
  Displays the mass of each particle. Mass is used with damping when manipulating particles. See Setting Manipulator Properties.
Mass Variance field
  Displays the variation of the mass (as a percentage).