Game Development Reference
Particle systems can be very processor intensive as they can require
hundreds or thousands of particles to simulate the desired effect. However,
having each particle represented as a 2D billboard helps lower overheads
A number of prefab particle systems are included in Unity packages;
however, the best way to get an understanding of their intricacies
is to create them from scratch.
Unity Hands On
A Snowy Retreat
Step 1. Download Chapter Seven/Particles.zip. Open the
SnowyRetreat scene in Unity.
Step 2. Select GameObject > Create Object > Particle System to add
a particle system into the scene. While selected, the particle system
runs even if the game is not. The default particle system is shown in
Figure 7.42 .
FIG 7.42 Unity's default particle