VelocityParticles needs to have a changing velocity. For these apply some Field over them. On the example image, all particles are colorized by a Red Colorize then masked by a Velocity Mask.
Some modifiers, like Colorize Function directly have a mask inside of them.
- Minimum Velocity Minimum velocity of the velocity
- Maximum Velocity Maximum velocity of the velocity
Particles: Colorize Function (with emit particles).compo.