After working on the UFO glow, I had no issues completing the project, and during render. I decided to find a tutorial on fog in After Effects that would allow me to create fog. I found the tutorial to be very helpful using particles in After Effects. I created a useable fog that I could use quickly in the future, that is easy and efficient to use.
http://www.youtube.com/watch?v=ZZcWU4C-ZcA