Sky Haze

Hi all;
I saw the sky haze effect in gscape (a terrain viewer program) and i found it very cool. Whats the bst way to implement it? Only with fog?

ATI has a tech paper and a D3D demo about outdoor light scattering
paper :
demo :

Wow, this ATi paper is really math-involved.
I guess all the nVidia papers togheter does not contain all those integrals!

Is there a binary form of the demo? I don’t want to compile it myself - I’m sure something will go wrong.

Binary :