I know there’s another reply with videos here. I’m gonna put an explanation in text.
The N64 had two things which made things smoother. It had sub-pixel precision for geometry after projection, and it had perspective-correct interpolation. This meant that moving objects looked smooth and didn’t “pop”. Games on the PS1 addressed the interpolation problem by subdividing, but you could sometimes see geometry suddenly move when you got closer and saw more subdivisions.
The N64 also had texture interpolation (kind of like bilinear) and antialiasing, but those don’t make as big an impact.
The N64 got all these things right, more or less, but had problems with memory bandwidth and small texture memory.
The N64 had two things which made things smoother. It had sub-pixel precision for geometry after projection, and it had perspective-correct interpolation. This meant that moving objects looked smooth and didn’t “pop”. Games on the PS1 addressed the interpolation problem by subdividing, but you could sometimes see geometry suddenly move when you got closer and saw more subdivisions.
The N64 also had texture interpolation (kind of like bilinear) and antialiasing, but those don’t make as big an impact.
The N64 got all these things right, more or less, but had problems with memory bandwidth and small texture memory.