>
>
>  GlideHack performs some special effects with a [3Dfx][1] card by
> interposing itself between the Glide library and its clients. To
> install it, simply put GlideHackLib in the extensions folder by
> dropping it on the system folder. You don't need to restart your
> Mac. Use the GlideHack Setup application to configure GlideHack's
> operation.
>
>

What it does:

 * Crash cleanup. If a game that uses the 3Dfx card dies
   unexpectedly, GlideHack tries to shut things down properly so you
   get your 2D screen back.
 * Screen capture. Ordinary screen dump methods don't work with the
   3Dfx screen, and not all games provide this functionality on their
   own. GlideHack lets you capture both snapshots and movies.
 * Various tweaks. This includes things like screen gamma
   manipulation.

DL #1 GlideHack Setup v1.3
DL #2 GlideHack Setup v1.1

Compatibility
Architecture: PPC

  [1]: http://macintoshgarden.org/apps/3dfx-voodoo-drivers-12345-utilitiesflash-roms