So i use paperMC to have an private server, i run it vanilla because i cannot wrap my head around how to add mods like alexs caves on linux with paper as a server, so i just have FAWE
So my newly generated world ended hollow, so no blocks between ore/resource blocks.
We did not notice because there was a ravine nearby, looked pretty much normal untill i wanted to add a cellar under the house and fell into the abyss. It cool because - materials galore but it breaks the world.
How to ensure it does not happend?
That is incredibly weird, and should be impossible. You’re positive that you don’t have any datapacks, or any other plugins? Is there anyone else with OP who could be pranking you?
Also, the way you add Alex’s Caves on paper is simple: you don’t. It’s a forge mod and requires a forge server. Datapacks like terralith, however, can just be added to your datapacks folder. It’s a vanilla feature
I just have fawe. Nothing else.
Its really even. Everywhere its just two layers of earth blocks, then its free fall till bedrock (or some material blocks)