To clear the map cache in Rust on PC:
Close the game completely.
Press Windows + R

Type: "C:\Program Files (x86)\Steam\steamapps\common\Rust\maps"

Could be C:\ or D:\ and if you dont have (x86) it will just be Program Files

Press Enter.
Find and open the Maps folder.
Delete the contents inside the Maps folder.
This only removes downloaded map data/cache.
It does not delete your character progression on servers.

You can also clear:

Cache folder → general cached assets
Downloads folder → downloaded workshop/server content

After that, restart the game and reconnect to the server. Rust will redownload fresh map data.

This can help fix:

Stuck on “Downloading World”
Corrupted map textures
Invisible terrain/buildings
Long loading issues
Server map mismatch errors