Even if you don't use GI, when Diffuse_Value = 1, materials over-react to light, and the specular is not in the correct proportion to the diffuse. In some way, the over-reaction was actually desirable to many naive users, since they ignore or know nothing about gamma correction.

Many such users felt things looked better with Diffuse_Value = 1. Well under those conditions, where GC is being ignored, DV > 1 is even better. In fact, if you're going to use DV for compensating for lack of linear response instead of doing GC, then 1 is frequently the wrong value. The correct compensating value will depend on how much IBL you have, how much direct light, and what color the item is.

Or - with DV=.8, and GC and IBL (as in Poser Pro 2010) everything is near perfect all the time.

The trouble is - if a naive user fires up Poser Pro or Poser Pro 2010, they often complain things look flat and blown out and they reject GC and often reject IBL.

That's because they have stupid shaders set up, which fools them into thinking these great new features are crapola.

Lame.
 

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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)