The pSpawn tool has a large number of controls, most of which exactly duplicate those found within the pEmitter tool. There are a few controls that are unique to the pSpawn tool, and their effects are described below.

Selecting this checkbox causes particles created by spawning to also become affected by the Spawn tool on subsequent frames. This can exponentially increase the number of particles in the system, driving render times up to an unreasonable degree. Use this checkbox cautiously.

This control determines how much velocity of the source particle is transferred to the particles it spawns. The default value of 1.0 causes each new particle to adopt 100 percent of the velocity and direction from its source particle. Lower values will transfer less of the original motion to the new particle.

The Style tab provides controls that affect the appearance of the particles, allowing the look and feel of the particles to be determined and animated over time. Please see 'Particle Styles' in the Particles chapter to learn more about styles.