Ok! grass problem solved momentarily apply code ALT+C
to close and re-enter I get the same problem
It wasn't a permanent fix, just a verification that it indeed is the cause. We'll enhance the detection of the sRGB bug.
Seems OpenGL is VERY sensitive to driver updates? or is AMD/Nvidia just not paying attention to OpenGL enough in their code?
The latter; not many game companies are using newer OpenGL features. In our development we hit and reported many driver bugs, because we were apparently first to use them. It's much better now though.
In this case it's a problem in sRGB handling, where some texture sampling calls do the color conversion to linear space and some don't.
On our 5770 card it doesn't show, so it's just some AMD cards from older series and some driver versions.