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Please read the pinned post on creating new biomes and dimensions. Remember that individual items, mobs, and structures should still go in their own categories - this is not a category for entire updates.

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Allow custom dimensions to use the same seed as the save file.

Currently only the Overworld, Nether, and End dimensions will use the seed that is generated when on world creation. When a custom dimension's seed is set to 0, (just like it's set in the vanilla dimension files), it will make the generation seed 0 even if the save file's seed is different. It would be nice to have and setting that lets it share the save file's seed.

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  • 4
    Registered User commented
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    It seems to be an oversight that players can create all manner of world configurations, but the seed has to be specified explicitly in the configuration. Changing the seed is not easy.

    The seed is currently a numeric value. What's needed are special values that allow random seeds. Perhaps "random" for a random seed and "inherit" or something similar to use the same seed as the global world seed.

  • 1
    Registered User commented
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    I honestly feel like this not being added is more of a bug than it needing to be required as a feature.

  • 1
    Registered User commented
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    This would be awesome, I wanted to create a "spirit world" that is like the one found in the old Witchery mod back in 1.7.10 but that can't really be done if I can't automatically use the world seed.

  • 1
    Registered User commented
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    I mean we already have things like this in json with "entity":"this", so you should be able to do "seed":"world" or something to automatically set it to something

  • 1
    Registered User commented
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    This totally needs to be a thing; I was so shocked finding out it couldn't be done.