slightly off topic, though not completely...
I was really excited in the late 1990s when TriTech Pyramid3D was getting hype. It hyped me.
that looked like Xbox-level graphics if not better.
one of their chips, TR25201 I think, definitally had a geometry engine on it, and if they had released it in a consumer~gamer card, it would've beaten NV10 GeForce out by a few years, as far as being the first affordable GPU~card with T&L
but... then Pyramid3D morphed into Glaze3D, then XBA, then I forget what happened. they went into mobile graphics....
*if* the original Pyramid3D family had been what I thought it was going to be, and *if* it had been what it was hyped to be.... then this is the only other graphics chip besides a Lockheed Martin Real3D chip that I would have wanted for Sega's successor to Saturn. Sure, PowerVR is great (better than what 3Dfx had at the time) but it was not my first choice for Dreamcast graphics chip. the TR25201 was a 1 million polygon per second GPU in 1996-1997. that's about on the same timeline as PowerVR1 PCX1 and PCX2, but way ahead in polygon performance. imagine a 2nd-gen Pyramid3D GPU for 1999.
geez, I went way off topic, sorry.