The remaining fill light is not to my liking - all it does is spread the light around and creates less contrast.

I turned off the remaining fill light, and increased my main light to 85%.

So now I have:

10% white ibl
85% white main light
25% pink back light

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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)