Dear friends, Gamma settings is now available server side, You can use the gamma setting via the console window

1. press the tab button once so the console is now on screen.
2. type in the console window "gamma x" where x is the setting you want

x values can be in range between 0 to infinity, the higher the value the less gradient the colors will they be. is very usefull for enhance the lighting during night times.

examples:

gamma 5 will give you a very nice way to see during the night times
gamma 2.2 will reset the lighting to default.

Have fun.