Fog and Clouds

#### Forward:

Well, I just added some fog into a level that I am working on, so I had best make a tutorial that delves into fog, and how it is used in UnrealED.

#### Abstract:

I will explain the basics of fog and how to use it, as well as explain colored fog.

#### Assumptions:

I assume that you know how to create lights, as well as a basic room (at least).

#### Tutorial:

##### Introduction:

Fog adds a feeling of being there, and that's what we wnat from our levels ins't it?

##### Setting the scene:

Before we get into fog, we must allow our editor to draw the fog. When you have selected a room for the fog to go, and go into the texture bar, but select "classes" now go into Classes>Info>Zoneinfo . Now add a "Zoneinfo" into your level. It doesn't matter where you place it, as long as it is in the same zone (don't place it underwater, if you want the fog just above the water level for example) as where you want the fog to go. Now open up the advanced properties, and then the zoneinfo tab. Change the "bFogZone" to TRUE, and close the advanced properties.

##### The light settings:

Well the hard part is out of the way, so now it's a simple amtter of placing the lights where you want them, and editing their settings like this...
The "Volume Brightness" setting will determine how bright the light is inside the volume of it's area. The "Volume Fog" setting will determine how "thick" the fog is. The "Volume Radius" setting will determine how large the area is that the light and fog effect. It is possible to play with color settings as well, to create colored fog. In the example show here, I have created purple fog (No not a "Purple Haze" :)...).

##### A Little Warning:

Fog !!SLOWS!! down pc's, and it should really be used sparingly. Creating a Huge outdoor setting, then filling it with fog might sound cool, but unfortunatley, it would be unplayable on everything but NASA!
If you have multiple zones, you will find that fog cannot be seen from one zone to another, so if you want multiple zones, then make sure you place a "Zoneinfo" in each zone where you want the fog, and set it to the above configuration.