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More the latter. I was following its development and one trick they played was converting the model geometry from triangle lists to triangle strips better suited for PowerVR. That let them push triangles to the hardware faster with a corresponding increase in framerate.

https://x.com/falco_girgis/status/1821266502412075174?lang=e...

Falco is very funny, BTW. He writes a lot of his Dreamcast posts like that gen of the console wars is present day.

It's an engine port from the decompilation project RE3. A lot to changes to get it to run

It also helps that GTA III was made using a well-known game engine (RenderWare).