Create a swampy, dreamy haze over a body of water in this chapter. We create another custom material and use the Stretch Particles setting to create two particle systems with different billboard behaviors working in tandem.

Unity 3 ships with a waterfall prefab that we modify to blend in with the hazy water from Chapter 7. We'll use several particle systems together to create the desired effect.

Learn how to make it rain by mimicking nature. We create a large, flat emission plane and emit thousands of particles with angled velocity and downward force. Coupled with the provided sound effects, this is an easy and immersive effect to use in your games.

Fireflies, though not really sci-fi, are bright and fluorescent, so here we are. Recreate one of nature's coolest bugs in this chapter using custom materials and some simple settings to simulate a lazy insect swarm.

We'll use the Line Renderer component to create and animate a laser. This doesn't use a traditional particle system but instead uses the Vector3.Lerp function to animate the line's start and end points over time.

We give a short overview of the other pre-made particle systems shipped with Unity 3. Fire, smoke, bubbles, and Variance Theory's Detonator explosion framework are discussed.