Edit: the following is applicable to the Rage LT *PRO*, not the Rage LT which is what the OP actually has. Some of the same driver packages will work, so I'm leaving this post intact, but not all of them will. Check Gona's driver compatibility chart (linked below) for more info.
The Rage Pro / LT Pro (same-ish thing) is more advanced chip than the Rage IIc. It does run OpenGL & D3D, within the limitations of what a DX6(?) GPU from 1997 can do. Games like Drakan (1997), GLQuake, Wipeout XL (1997), Unreal 1, etc. seem to run pretty well on it. It's roughly comparable to a Voodoo 1, maybe a bit faster in some cases & supports higher resolution in 3D. Think Voodoo 1.25?
I'm using the w82560en.exe "Technical Support Driver" (tesed by Gona in his compatibility matrix, available here) which gives CIF compatibility in Wipeout 1, Tomb Raider, etc. It *should* come with a full OpenGL ICD which some of the really old driver versions didn't.
Gona's entire archive of CIF libraries is available & you could try splicing these into newer versions of the driver to potentally get CIF along with better OGL/D3D support. You can also try the M6.12.12 driver from "Z's Page of Tweaks" which purports to offer (not feature complete) DX8.1 support. To be honest, I don't know how these version numbers line up.
The S3 Virge/DX is faster at 2D and has better compatibility. [...]
Only under DOS (and only for a few specific 2D scrolling games from way earlier, e.g. Commander Keen.) The Rage Pro is an excellent 2D card for Win9x - it uses the Mach64 accelerated core and has nicer image quality than S3's early stuff.
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