OldYLevels
ArchivedChanges the Overworld height to the old Y range, 0-256. This will basically crop off parts of your world if you don't pregenerate the world on an earlier version of the game.
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OldYLevels has been archived. OldYLevels will not receive any further updates unless the author decides to unarchive the project.
Compatibility
Minecraft: Java Edition
1.21–1.21.1
1.20.x
1.19.x
1.18.x
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Details
Licensed CC0-1.0
Published last year
Updated 12 months ago
OldYLevels
Change the Overworld's Y range back to the old 0-256 range.
That's it! Just put it in your world/datapacks/
folder or load it locally and it will work.