Well first just set your main light to around 75 to 85% and make it white.

You'll see a huge difference.

And that's all you should use for outdoors. The other lights (fill lights) are not necessary or correct for outdoors, since you are using IDL + GC.

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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)