Ah - shadow blur radius (2.4) is way too big. The sun's blur radius is .5 - no more and no less. (it's 1/2 of a degree)

The shadow strength is not 1 - it should be 1.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)