Who's interested in trying to implement this paper in our engine: http://www.ati.com/developer/dx9/ATI-LightScattering.pdf We don't need to implement the code as a vertex shader, because the player is almost always on the ground (or close to it) we don't need to modify the fog as they suggest. We would render to a texture and apply this to the skydome. We should discuss this first before anyone tries it to see if there are issues we need to sort out first, such as clouds and whatever. Darryl