The game by default doesn’t give you an option for 3DFX om the first menu and hence will only run in software emulation mode and this still brutally slow in DOSBOX! So what is the workaround?
None of the ones I found on Steam boards helped. (It would just end in the option window closed)
So, here is how to do it:
1) Run nglide_config.exe, then selecting my native screen resolution and pick aspect ratio as 4:3.
2) Run the Game normally.
3) Select option 2 – Client
3) Want to change IP address? – No
4) Select option 1 – 3DFX
And voilla, you are in 3DFX mode without modifying any files of the game! 🙂