OLC I've taken a look at your sunhalo.tga and did some tweaking to it. Going to send you my results in a PM to you but here is some shots,
Nothing fancy at AA 2x for Nvidia but the halo moves as you pan the screen in LOS with the sun.
At AA4x it starts to look good as you have said. I like this look give it a more lively feel,
Sunset is looks really good
Sun is almost gone at AA 4x hehe.
PMed ya for the file should you want it
