Now you *can* add more fill light. Why does that work? Well, if everywhere it is too dark, you make it less dark, then you're basically doing manual gamma compensation.

Like this. I increased the luminance of my IBL from 5% to 40%. That is 8 times more ambient light.

I have filled in the shadows a bit, but I've lost something on the lit side. It doesn't look so real. It looks - washed out!

So now you might think - oh I should boost the specularity on the skin. But why? Just because there is more light, there should be more specularity added to the shader? Isn't that counterintuitive? Should we not expect that there is more specularity when there is more light?

The naive would say that Poser lighting is "hard".

It's not hard at all if you enable GC. Lighting just works the way you expect it to. Even better, you can look things up and expect the simulation parameters for shaders and lights to make sense - to correspond with the real world.

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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)