@BB

As I started the mentioned thread, but never really finished it, I can do that here.

I started V4 scenes and GC made her look sick. It turned out that this was caused by the cyannic color offset used in her skin textures. After I removed those, enabling GC is the best thing one can do for his images. Not because linear workflows, but simply because a GC image matches the way the human eye and mind deal with dark areas, and because nob-GC images have a very hard time dealing with details in the dark.

In the thread mentioned BB gave an excellent example (the black water surface reflector). With a little experiment you will find out that there is really no way of making a non-GC image of this scene and correcting it in post. Not even when handling HDR-formats.

So, IMHO, render GC should be on in all cases. Material GC should be set to render GC for color maps in order to avoid artifacts, while material GC for value maps should be set to 1. Only color maps created on older Macs might be set to gamma=1.8.
To my experience, if the image does not look good, the cause is in the materials, or in the lighting. Not in render-GC.

- - - - - 

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