How to use a custom world seed on a Core Keeper server

worldSeed controls generation for a new world. It does not rebuild terrain that already exists, so choose the seed before the new slot is first loaded.

1. Stop the server and open ServerConfig.json.
2. Select an unused world slot.
3. Enter the required seed as the worldSeed string and leave hashedWorldSeed at 0.

   

4. Save the file, start the server and join the new world.

"world": 2,
"worldSeed": "123456789",
"hashedWorldSeed": 0

Use "0" when you want the game to choose a random seed. Do not change the seed on an established world and expect explored terrain to be regenerated.