excellent post, man, should help many people out!
Originally Posted by newconroer
As a last note, and word of warning. When you use R2_Sun_Far 51, you receive the best possible shadow quality, but from time to time you will find black lines(not like the ones in the screenshots above) instead of actual shadows, far out on distant landscape. It's probably only seen about 5% of the time, and isn't intrusive, but if it does bother you, you can use R2_Sun_Far 70 and that should be a fair compromise.
just wanted to point out the black-line shadow thing here - I think that's by design. At a certain distance, shadows don't look "filled-in", and you get those lines. If you pay real close attention to those shadows, while getting closer to a wall . . . past a certain distance, they go from broken lines to fleshed out shadows.
now if there was only a way to increase this distance setting . . .