The output type of a Particle Flocker attribute controls the value which is used per particle during simulation.

There are several output types available:

• Constant
• Random Between 2 Values
• Per-Particle Expression

You can change the output type of an attribute by selecting the small blue arrow to the right of a Particle Flocker attribute in the Particle Flocker Window.

Alternatively this can be done in the Attribute Editor of a ParticleFlocker node by changing the attribute’s Type attribute as shown below.