Do you mean something like this? Very simple, I know. If you've updated to SR2.1, they added a function to the lights called atmosphere strength. Click on the properties tab of a light, and it's down near the bottom. In this image the middle light is set to 1, and the others are set to 0.5. The atmosphere settings I used were Volume on Volume color white Volume Density 0.02 Volume Stepsize 1.5 Let me know if this is what you were looking for, and if you need further assistance. GF