I talked to the Dev Team and they're looking into it and it's on the To-Do list ;)

This is what I got from our Dev:

Download http://dege.freeweb.hu/dgVoodoo1.50Beta2.zip (we checked it on 1.40 and it was working)
Copy glide.dll and glide2x.dll to the games folder.
Change the parameters in the registry as follows:
Windows 32bit
HKEY_LOCAL_MACHINE\SOFTWARE\GOG.com\GOGBATTLEISLE3INCUBATION\LAUNCHPARAM
Change "-english -directx" to "-english -3dfx".
Windows 64bit
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\GOG.com\GOGBATTLEISLE3INCUBATION\LAUNCHPARAM
Change "-english -directx" to "-english -3dfx".

It should work (it works on our test PC's) but we are not responsible nor we support any damages and/or problems that arise with this modification.

Have a nice day !