GC is Gamma Correction. Very important. Without GC, lighting does not make sense.

It is because computer monitors (and every other digital imaging device) uses luminance values specified in a non-linear format called sRGB. Renderers calculate lighting in linear color space, not sRGB color space. When we display the result, it looks wrong. People generally compensate by adding more lights.

When you take into account the fact that images are not linear luminance, but sRGB, then everything becomes easier. The process of converting from linear to sRGB space is called gamma correction. There is more to a linear workflow, though. It requires that incoming material (user-defined colors, color maps, etc.) have to be converted from sRGB color space to linear color space. Then you do the rendering calculations. Then you convert back to sRGB color space for the final result. Poser Pro has all this built-in and will do it automatically.

If you didn't have Poser Pro, we'd have to do a lot more work.

I'm making a simple light set for you. But I haven't worked with Poser Pro in a long time. I'm using Poser 8 or Poser Pro 2010 now. Anyway, I'm testing it with my RM Kyrsten in Poser Pro. It's taking a long time because Poser Pro's library is hard to navigate. It takes me a lot longer time to find things compared to Poser Pro 2010.

Also, Poser Pro renders much more slowly.

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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)