[1.16.5] New World Creation

[slave2midna]

Game gives an alert when starting a new World, that I'm using "Experimental Settings" - is this normal? Or have I done something wrong with my installation?

Removing the mod makes the error go away.

[AllenSeitz]

That's a completely vanilla and normal thing. Mojang added that alert in 1.16 and removed it in 1.18.2 because it was annoying players.

Full story. In 1.16 Mojang added the ability for new biomes and dimensions to be added via datapacks. In fact it is now required to do it that way instead of with a mod. We can't quite make mods like Biomes O' Plenty run on a vanilla client yet since they add new blocks. But if you wanted to make "Biomes O' Plenty: no new blocks edition", then you could load it on an unmodded client, and that's pretty cool!

However Mojang can't promise that any worlds using experimental settings are upgradable. So they put that alert there to warn players. But for what it's worth there has never been a problem upgrading experimental worlds up to 1.18.2 as long as all of your mods have updated too. Since you're a Forge user I recommend adding another mod, ShutupExperimentalSettings for 1.16.5 and then in 1.18.2 this won't be a problem anymore.

[slave2midna]

Thank you so much! That helps, and I'll do just that!