Same question was answered here:
Windows games that look better using Glide

That thread is 12 years old, and only mentions a few specific games.

I can add Rayman 2 and Need For Speed II Special Edition.

NFS2SE is Glide only, no Direct3D. Without a 3dfx card, you get software-rendering only.

willow wrote on 2020-04-26, 18:49:

I would like if it exist a list even incomplete)of game which are better graphics in glide mode than in direct3d mode.

It remains to be seen whether the original poster was specifically looking for games that have both Glide and DirectX hardware rendering, or just for games that look better in Glide versus anything non-Glide.

Grand Prix Legends is a title that hinges on the distinction that dr_st is making. Initially, the game supported only Software Rendering, 3dfx (Voodoo1 or Voodoo2) and Rendition Verite. Subsequent patches added D3D and even OpenGL (as a Beta). I always found Glide to have the fewest artifacts, but if memory serves, the OpenGL renderer offered twice the resolution in rear view mirrors, and that could be a key thing, depending on your preferences and priorities

A lot of it is D3D API immaturity, some of it is 3dfx being arcade first with no CAD ambitions. And then there's sometimes the silly placebo effects of quality coming from the high default gamma values (unsurprising given arcades' CRTs) and the smeary smudgy filter I like to raise awareness about for the thousandth time here since that's the big unmentioned 3dfx exclusive feature*. Comparing 3dfx vs the 2nd/3rd generation of 3D accels (TNT, i740, Rage 128, etc) is much more subjective when they're all capable with blending functions.

Also another factor how "3dfx better!" is some engines, mainly UnrealEngine1, don't have the best feature parity or optimized D3D/GL driver.

* = some 3rd party drivers "fix" this by disabling it in the registry. also V2 SLI doesn't filter due to timing issues

dr_st wrote on 2020-04-26, 20:18:

It remains to be seen whether the original poster was specifically looking for games that have both Glide and DirectX hardware rendering, or just for games that look better in Glide versus anything non-Glide.

I don't want to compare glide versus anything non-glide but only glide versus directx and I speak about graphics effects and not framerate.

Vetz hasdmade a amazing works with these videos comparing differents versions of some game and explaining the graphics differences between. It's the best works that I have nevers seen.
I would like the same (a list is sufficient) but with lots of games comparing graphics quality of directx and glide versions

For example,

1541 wrote on 2020-04-26, 18:54:

Same question was answered here:
Windows games that look better using Glide

Thanks for the link but there are only some games.

I think that a this list doesn't exist but it's difficult to find the differences between directx version versus glide version for lots of games and even nearly all games. It's more easy to find differences between pc and ps1 for games on internet that differences between directx and glide versions for pc game.

As a rule of thumb, any game that uses DirectX 5 or earlier should look better under Glide. The DirectX 3 games are particularly ugly and immature. They also run much more stable in Glide mode and generally look better in Glide mode.

But many games have been patched. Some games offer high resolutions with a color depth of 24 or 32 bit, which were much too slow on old TNT2 cards at the time, but run well on more modern cards and are therefore usable. A Voodoo 3 card with its 22 bit post filter and low resolution can be at a disadvantage.

Then there was S3TC texture compression support. If the game supports this and therefore provides higher resolution textures, it usually looks better under DirectX than under Glide. An example would be Giants: Citizen Kabuto. Up until Voodoo 3, the Voodoo cards only supported texture sizes of 256x256 pixels.

And then there are games for which there are high-resolution texture mods available. These games look much better with these Mods than with the standard textures under Glide. Deus Ex 1 and 2 are two such candidates.

Well, and finally there are games that offer more graphics effects with software rendering than in the Glide version. One example is Archimedean Dynasty (German Title: Schleichfahrt)