I've been working away at getting atmospheric scattering into my XNA Terrain Renderer and so far the results have been quite pleasing
It is basically an implementation of Preetham's ATI demo/paper with all shaders rewritten by myself in HLSL. It is by no means finished, but I reckon it is a decent start
I put up a youtube video here, but the quality isn't all that hot, so here are a few screenshots as well
I still need to work on reducing the size of the sun as it is rather humongous, but it is exactly the same as the Preetham demo and I actually kind of like the heavily bloomed look
Shadows are next, so it is time to start reading papers on Cascaded Shadow Maps. I love working with Terrain