In the middle of the Generator Param1 menu, a table lists the different particle generation properties.
Each parameter has a variance value used to specify how much the parameter varies each time particles are generated. Exactly what gets varied depends on the parameter.
For example, if you set the Number parameter to 10 and its Variance parameter to 5, the number of particles generated at each frame is randomly selected between 5 and 15.
The unit of measurement used by each Variance field matches the parameter it is varying. For example, if the Number parameter is expressed in particles per frame, so is its Variance field. The Speed parameter is in pixels per frame and so is its Variance field.
(a) Particle generation properties
- Number field
- Displays the number of particles generated per frame. Editable.
If you specify a number less than 1 (from 0.1 to 0.9), particles are generated randomly. For example, if you set the number to 0.1, a particle is generated every 10 frames. The exact frame within those 10 frames when the particle is generated is randomly selected. If you set the number of particles to 0.3, a particle is randomly generated approximately every three frames.
- Number Variance field
- Displays how much the number varies each time particles are generated. Editable.
- Lifetime field
- Displays the number of frames each particle lasts. For example, if Lifetime is 20 frames, a particle generated at frame 15 disappears at frame 35. Editable.
- Lifetime Variance field
- Displays how much the lifetime varies each time particles are generated. Editable.
- Size field
- Displays the size of each particle, in pixels. This parameter only affects cones, spheres, quads, squares, and objects. Editable.
- Size Variance field
- Displays how much the size varies each time particles are generated. Editable.
- Speed field
- Displays the speed of each particle, in pixels per frame. Editable.
- Speed Variance field
- Displays how much the speed varies each time particles are generated. Editable.
- TrailSize field
- Displays the length of each particle's trail, in particles. A particle trail only appears when the Trail button is enabled. Editable.
- TrailSize Variance field
- Displays how much the trail size varies each time particles are generated. Editable.