Lighting (dust)

I created two different lighting effects in 3DS Max  I first created a box for the light to shine on and went and placed down a omni spotlight. Then by going on the edit menu and then clicking on atmosphere then new the enviroment and effects screen comes up allowing me to change lighting effects.

Firstly I went and picked the fog colours I went for old dustly, earthish colours. I turned the noise on made sure the effects were linked with the light and added some turbalence, the size was set to 20 so the render of the light came out like this.

 

The light has now created  a thick dust trail because the density was set to 20, when I change it down to 1 it creates a very fine dust trail.