[x3d-public] Gamma correction in X3D and glTF

[Michalis Kamburelis]

Hi,

I was following information about gamma correction from the other
thread, in particular information from Andreas Plesch about what X3DOM
does (thank you -- your mention of X3DOM + gamma correction was
incredibly important for me, it jump-started a small reading session
after which I'm hopefully smarter :) )...

I looked at glTF specification and sample implementation, in regards
"what do they say about gamma-correction".

I collected my conclusions on
https://github.com/michaliskambi/x3d-tests/wiki/Gamma-correction-in-X3D-and-glTF
. Comments are of course welcome.

A summary, along with notes "what to do in X3D spec (4.0 or future
spec version)" are at the bottom.

Regards,
Michalis