And just when you think you've heard of all mid-90s 3D chips, here's the Toshiba TC8512 Gouraud Shading Processor:
SKUs: TC8512G, TC8512YM. AKA "TC8512G/YM". Nicknames seem to be "HSP" or "HSP-1", short for "High Speed Shading Processor" or maybe "High Speed graphics Processor"...