Quote - Whoa - we seem to have some things mixed up.

With IDL, we cannot use GC shaders. These are producing non-linear voltage levels for display on monitors, not actual luminance values. When you give IDL voltage levels instead of linear luminance levels, it makes nonsense.

Sorry to be picking this up again...do you mean that with IDL we cannot use GC shaders for reflections or all materials.
This kind of explains one problem for me but presents another. For a time I did stop using GC in the VSS PR3 skin shaders but I was finding that even with Tone Mapping this was creating very heavy dark shadowing on models under armpits and in eye sockets etc, especially where GI was doing most of the lighting. This seemed particularly acute with bright outdoor scenes lit with the EnvSphere and maybe a couple of other lights. I tried a variety of Equirectangular maps and HDRI's. Using GC shaders and no TM seemed to prevent this.
Conversely, in low lighting setups the non GC shader setup rendered with IDL and TM were much better than with GC shaders and no TM.

So it seems certain lighting conditions favours different approaches...?

 

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