How to Disable Minecraft Java Edition 1.21+ Experimental World Settings (1.21.1~1.21.8)

 source : mojang(Microsoft)

I recently opened Minecraft and enabled the experimental world settings that were introduced in version 1.21+. 


While the gameplay itself wasn't affected, there were some minor bugs like duplication kits (dupers) becoming unusable. 


Additionally, when using trading conversion features, trades change items by time intervals, but it causes villager bugs.


Here's how to forcefully disable these settings.


What You'll Need


source : mirseo


First, you'll need this tool. 
While Minecraft data is known to be stored in chunk units, experimental settings are stored in common configuration (CFG), 

so when working with these files, you need to modify NBT data (not .mca files).




For those familiar with GitHub, go to the Releases tab (you could build it yourself, but since it takes time, I'll just use the release version).

https://github.com/jaquadro/NBTExplorer/releases/tag/v2.8.0-win ← Direct link to releases


source : mirseo

Download and install the NBTExplorer-2.8.0.msi file from the releases section.

Modifying World Files

source : mirseo

The experimental options must be enabled for this to work!

source : mirseo


When you open NBTExplorer, you'll see something like this. There's a page showing modifiable worlds where you can select the world you want to modify. I'll use "cfg" for this example.


Next, open the level.dat file of the world you want to modify.



When opened, you'll see quite a lot of settings. What we need to look at are:

  • enabled_features : 4 entries

  • Datapacks > Enabled 4 entries

    • Here, click the scissors icon to move everything except "vanilla" to Disabled and paste them there.




    This means success!



    Delete this data (DO NOT delete vanilla)


    Click Save, then work on the level.dat_old file in the same way. After that, restart Minecraft and check your world information.



    You can see that the experimental options have been removed from the cfg file like this :)

    Korean versions of this article are available at tech.mirseo.dev :)


    Writer

    Mirseo | Developer & Philosopher

    Exploring the intersection of technology and philosophy to understand our world.

    GitHub: @mirseo | Blog: https://blog.mirseo.dev


    Writer Text

    Originally written by JunHyeok-Seo(Mirseo) in Korean, translated and adapted

    Korean version available at mirseo.dev/tech.mirseo.dev


    Tags

    Minecraft, Minecraft Java Edition, NBTExplorer, Minecraft Modding, Minecraft Tutorial, Experimental Features, Minecraft Bug Fix, Minecraft Tips, Gaming, Minecraft Guide, NBT Editing, Minecraft 1.21, World Settings, Minecraft Troubleshooting, Minecraft How To, Minecraft World Modification, Disable Experimental Features, Minecraft Java Edition Guide, Minecraft NBT Editor, Minecraft Technical, Game Modification, Minecraft Advanced, Minecraft Tools, PC Gaming, Minecraft Community



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