Changing Fog Color By Area?

I’m trying to figure out how to have different areas have different fog and fade colors. Ideally, I would like to have it within a shape because having a fade/fog color within a shape that I could manipulate would allow a lot of freedom.

You can grab a handle to the render settings fog settings and tweak however you’d like based on an area (for example, an OnTrigger sphere); See the doc for more details on accessing fog

http://docs.unity3d.com/Manual/class-RenderSettings.html