Trying to edit the gamma settings for the 3DFX version of Mechwarrior 2, but whatever setting either in the control panel for the drivers or in a batch file with set sst_gamma does not work. I can see the 3DFX logo react to the changes, but the game itself does not. Is there some kind of built in gamma control for Mechwarrior 2? Is there any other way to fix this?

Hardware: Orchid Righteous Voodoo 1 4MB
Windows 98 SE
P3 1ghz
Asus P3B-F

After some testing I can change the gamma settings in 640x480, but in 800x600 it's the same result as described above. I've also tested with a Voodoo2 card, but with no luck.