Here are some test after 22 years inactivity in the topic, 25 years after the release of "officially" glide-compatible Creative TNT cards:
croc d3d:
croc glide:
f22 l3 d3d:
f22 l3 glide:
tachion d3d:
tachion glide:
frogger d3d:
frogger glide:
freespace2: crash
hype the time quest: refuses to run due to missing glide3x
emulators (ultrahle): no picture
Most of the Glide games i tested, ran, but they were glithes in most titles to some extent.
-About 10% of the Glide games run without glitches.
-20-30% of the Glide games refusing to run at all.
-20-30% of glide games run with minor glitching
-10% of glide games run with major glitching (unplayable).
If someone bought Creative TNT or TNT2 cards just because it was advertised to be Glide compatible, probably didnt had a good experience.
Pros: When using with very old glide-only games, it was indeed able to make the thing run. Newer games already had d3d or opengl versions, it made more sense to use them like that.
Cons: The Glide implementation for the TNT requires strong CPU, as it uses D3D as hardware backend. The Glide driver has about 30-40% bigger CPU overhead compared to original 3dfx glide drivers. Most of the games are glitchy.