Version: 5.4 beta (switch to 5.3)
Triggers module
Texture Sheet Animation Module

Sub Emitters Module

This module lets you set up sub-emitters. These are additional particle systems that are created at a particle’s position at certain stages of its lifetime.

Properties

Property: Function:
Birth, Collision, Death Phases of a particles life where sub-emitters can be created. Two sub-emitters can be added for each phase using the “+” arrows at the right of the inspector.

Details

Many types of particles produce effects at different stages of their lifetimes that can also be implemented using particle systems. For example, a bullet might be accompanied by a puff of powder smoke as it leaves the gun barrel and a fireball might explode on impact. You can use sub-emitters to create effects like these. The sub-emitters are just ordinary particle system objects created in the scene or from prefabs. This means that sub-emitters can have sub-emitters of their own and this type of arrangement can be useful for complex effects like fireworks. However, it is very easy to generate an enormous number of particles using sub-emitters, so you should take care that performance doesn’t suffer as a result.

Triggers module
Texture Sheet Animation Module