at the later posts:

It might not be a surprise (to BB), but it shows that the anti-GC and the GC steps in the process do cancel out, under full flat lighting and no tonemapping. Which shows that Poser-GC is not about gamma correcting the render result, but is about the net effect of the sandwiching. Which is unrelated to colorspaces, nonlinear output devices and so on.

As I'm not that good in English, I just don't understand "...render me a flat surface... showing something like a figure..." What exactly should I create?

I do know that a single gamma correction increases the nuances (dynamic range) in the shadows at the cost of losing the nuances in the hilights. Tonemapping / Exponential exposure does exactly the same, and is in line with the working of film, camera CCD's and the human eye. And again, Poser does not perform a single gamma correction, it applies a sandwich. And I still fail to see why I need one, when tonemapping is on.

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Usually I'm wrong. But to be effective and efficient, I don't need to be correct or accurate.

visit www.aRtBeeWeb.nl (works) or Missing Manuals (tutorials & reviews) - both need an update though