Hey sher_jakupov,
- This project doesn’t have a weather system, but you can do that by using content from the marketplace.
- I would take a look at OSM for Blender. I guess that it has everything you need.
The time slider and is using a Material Parameter Collection to pass the information to the material with the glowing windows. If you want to use the same material as provided, please make sure to apply a UV Box mapping (with 1 meter for each direction) to the building models. - We created them in 3dsMax, but OSM for Blender will probably do a better job on that.