> With the recent discussions related to gamma handling I thought I'd post
> an image comparing how transmit behaves with respect to assumed_gamma in
> a texture overlaid upon an image base texture. The behavior of transmit
> at an assumed_gamma (ag) of 1.0 is something I like less well than its
> behavior at an ag of 2.2.

Is the problem here though is that you're trying to solve this by 
tweaking gamma? Maybe it works for this issue, but it's also going to 
affect all the other lighting and colours in your scene.

The better approach would be to figure out how to achieve what you want 
without changing the scene-wide gamma setting. What if you adjust the 
gamma of the image and the "gamma" of your rgbt values (ie don't step in 
equal steps for each column)? You might have to sit down and work out 
the maths to get what you want without changing assumed_gamma.

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