Global Variables for Matrox OpenGL driver?

[Andre]

Hi,

Do they exist? Basically, the question is prompted by some OpenGL games (Quake I-II etc.) which are way too dark. I have to increase gamma in Power Desk prior to starting the game to the levels it stings the eyes, to have a reasonable brightness in the Quake based games.

I remember there was a number of global variables I could set for Voodoo MiniGl (in autoexec.bat or any separate batch file), so there was no need to change the desktop settings.

Any suggestions? (not IDGamma though - it did not work for me, and I am interested in a more generic OpenGL tweaking)

Thanks
Andre

[Kruzin]

Nothing that affects OGL as a whole...but games like Q2 have ways of adjusting gamma and brightness within the game. Most of this is done with script files, or in the autoexec.cfg of the game.

These are the lines I use to brighten up the game. These settings go way beyond what can be done in the game options...

set intensity "1.0"
set vid_gamma "0.9"
set gl_modulate "3.5"
set gl_saturate "0"

[Kruzin]

The method I mention does not require messing with the gamma slider...just putting the right lines into the games autoexec.cfg.

Once those lines are there, you only have to start the game. You should not have to mess with the PD gamma at all...

[Andre]

Thanks, Kruzin!

Can I approach it another way, i.e. can I change the Power Desk settings via batch commands (particularly the PD gamma)? It would eliminate the need to go through properties/advanced/colour/gamma slider every before and after OpenGL applications.

Andre

[Andre]

Thanks again! I won't mess with PD gamma, then. BTW, the lines work fine with Quake II, I just could not find an equivalent for Quake...

[Kruzin]

Each game has it's own...Q2 and HL are the ones I know....if you ask in the Matrox Games forum, someone may know the right lines to put in for other games...