Gentlemen,

being a trained photographer the whole gamma issu is becomming a bit of 
a non issue to me, but alas

Gamma is a necessary evil. It has to be explained, so, yes a tutorial 
is needed. The differences in output between 3.6 & 3.7 are of minor 
importance to me. In the time since the 3.6 release I gues over 80% of 
the users have switched from CRT to LCD that has no gamma at all. So an 
old image will never look the same on a new monitor. The spread of 
quality between LCD's I find quite big, so big a "gamma" adjustment 
would be needed.

Digital imaging has progressed over time, digital camera's are commen 
now. People will expect the "same" output of a renderer as from their 
camera. So, I would suggest a simple setting for the user to choose 
colour space, not just gamma. Most digital devise use sRGB now, so for 
many platforms that would be the default. A special colour space could 
be "linear" for a gamma = 1 output (it's been some time ago, but 
doesn't the hf_gray setting automagically create gamma = 1 images).

For the common problem of gamma abuse in the past, for that "tone 
control" or contrast control would be nice.

ingo

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