Paper 1.18 and more

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The 1.18 update​

After the initial release a bit over a month ago, Paper 1.18.1 is now deemed ready for use in production environments. As with any upgrade, please ensure you have a functioning backup before proceeding. World downgrades are not supported under any circumstances.

Upgrading worlds to 1.18
With the increased world height that 1.18 brought, Mojang has introduced retrogen to allow worlds using the old (0 to 256) height to upgrade cleanly to the new (-64 to 320)...

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