experimental features

[harsh hawk]

not sure where else to ask, but I wanted to add minecart improvements experimental feature to my alr existing server, so I modified the level.dat and when the server starts this shows in console: [main/INFO]: Found feature pack ('minecart_improvements') for requested feature, forcing to enabled and then [main/WARN]: Failed to load datapacks, can't proceed with server load. You can either fix your datapacks or reset to vanilla with --safeMode

[ornate rose]

Last I checked the experimental minecarts had to be enabled on world creation.

https://minecraft.wiki/w/Experiments

See the section on toggling this for servers

[fossil kestrel]

Technically you need to enable them on world creation but I was able to enable minecart improvements after the fact before

There was some trickery around editing level.dat, let me try to remember what it was

[fossil kestrel]

@harsh hawk I did this for a singleplayer world in 1.21.10 and the trick was to add the enabled_features field in the level.dat file, just as you have in the screenshot. If this isn't working on a server, maybe edit server.properties? If you did this "properly" (that is, enabling experiments on world creation), then the initial-enabled-packs=vanilla line would have minecart_improvements added to it.

Note that as was said above, you're supposed to add these datapacks on world creation. I don't think anything should break from doing this? But I take no responsibility if something does go wrong

Mess with level.dat at your own risk

[coarse temple]

you can modify the mcmeta file

ie

{
  "pack": {
    "description": "minecart"
  },
  "features": {
    "enabled": [
      "minecraft:minecart_improvements"
    ]
  }
}

will enable minecart improvements in your datapack

(pack.mcmeta file)

[ornate rose]

This won't work for existing worlds

[coarse temple]

no of a datapack

then plug it in

should work from memory

let me test

should work

ill test on a diff world rq

before

ok

it does infact not work mb gng