Why would I have several shadow lines from the sun?[attach=1]
Bizarre. Looks like some settings been shifted somewhere. My best guess would be you got soft shadows on in your sun but with very low samples.
My soft shadow diameter is set to 5 and my samples is set to 9.
Maybe increase the samples?
And jitter on or off?
Oops! Jitter samples was off. Looks better now with it on. Thanks Ulco.