There's definitely some manual curation. They even have assets that are clearly being placed into the scene, like the boats moving in the water.

You could theoretically generate all possible animated sprites (birds, people, vehicles, etc.) for use in any given cityscape, but automatically segmenting/detecting the different valid "paths/waypoints" where those assets should be placed would probably end up looking pretty janky.

Either way, really nicely made, I love it! Small change request: adjust the CSS to make the controls look less vibecode-y.

https://cindori.com/backdrop

https://safaelmali.gumroad.com/l/lofi-cities-complete-collec...