The map in PixARK is changed using SEED, a number that defines the map.
https://pixark.fandom.com/wiki/Maps
- Shut down the server
- On the main server administration menu, click Configuration Files
- For the World.ini file, click on the text editor
- For the line ServerSeed=123456 enter your seed
- Save and exit
- Open FileManager or FTP and go to pixark/ShooterGame/Saved/CubeServers/CubeWorld_Light
- Delete Your World, it's called "pixark" by default
- Turn on the server
