I am currently browsing through the include files to see if I can give a 
meaningful contribution to their upgrading to 3.7+ standard. Over time, 
some have been added to or partly upgraded, some are in am almost 
pristine state going back to version 3.1.

I started small and upgraded skies.inc, using the scene files provided 
in scenes/textures/pigments/skies.

This brings up a couple questions, illustrated by the images below. In 
this particular skies case, the scenes are typically labelled version 
3.6 with assumed_gamma 2.2 (image: s_cloud1-1). Obviously, this cannot 
be maintained in any self-respecting program promoting assumed_gamma 
1.0! :-)

So, I changed assumed_gamma to 1.0 (image: s_cloud1-2) and while I was 
at it, I experimented with Ive's transformation macro and Clipka's 
colour boost macro, and thus achieved a version with srgb colours 
(image: s_cloud1-3). These macros have been discussed  fairly recently 
in these ng's.

The fundamental question is: What do we want?

-- 
Thomas

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