How is this done technically? So many moving parts and the tracking on each is exquisite. My initial observation is that the camera moves are very similar to a

How is this done technically? So many moving parts and the tracking on each is exquisite. My initial observation is that the camera moves are very similar to a camera in a 3D modeling program: on an inhuman dolly flying through space on a impossibly smooth path / bezier curve. Makes me wonder if there is actually a something like 3D simulation at the root here, or maybe a 3D unsupervised training loop, and they are somehow mapping persistent AI textures onto it?