Games like Super Mario 64 were revolutionary: full, round, hi-definition 3D models moving in real-time and able to be interacted with. This was because they were designed for machines with separate graphics processors. These GPUs would handle anything from overlaying images to rendering 3D models, even processing sound in some machines.
However, many great 3D games were created for machines without GPUs. What techniques were used to create 3D effects without a GPU?