https://github.com/slicedlime/examples/commits/master obtain datapacks here (1.18-rc4) for 1.18.1 worldgen
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dimension_type folder:
the_nether.json
//Change #1 - Raise world height in the nether
"height": 384,
the_end.json
//Change #1 Raise world height in the end
"logical_height": 384,
//Change #2 Raise world height in the end
"height": 384,
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noise_settings folder:
end.json
//Change #1 - Disable noise caves to generate pre 1.18 farlands in end.
"noise_caves_enabled": false,
//Change #2
"y_scale": 4000000.0, //Overflow the y axis generating sky farlands in the end!
nether.json
//Change #1 - Disable noise caves to generate pre 1.18 farlands in nether.
"noise_caves_enabled": false,
//Change #2
"xz_scale": 12500.0, //Overflow the xz axis generating farlands 1000 blocks from spawn in the nether!
overworld.json
//Change #1 - Disable noise caves to generate pre 1.18 farlands in overworld.
"noise_caves_enabled": false,
//Change #2
"default_fluid": {
"Properties": {
"level": "0"
},
"Name": "minecraft:air" //replace minecraft:water with air to make farlands not generate ocean causing the server thread to freeze
},
//Change #3
"xz_scale": 12500.0, //Overflow the xz axis generating farlands 1000 blocks from spawn in the overworld!
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Mineuniverse