Tall Lands

NOTE: make sure you explicitly pick which version you download, especially if you downloaded one and it doesn't seem to be doing anything; 1.faraway.0 is FARAWAY tall lands.

a Mixin Subproject

compatible with basically everything, and affects all data packs and basically all mods.
(unless the other mod writes its own world generator noise sampler)
I recommend using this as part of a modpack if said modpack is boring by itself.

Part of Minecraft's world generation sampling code involves dividing a number by 128 before returning it. All I did was removed this divisor, and the results are very cool. It almost turns Minecraft into a completely different challenge.

This mod shouldn't necessarily require a beefier CPU, but I haven't tested. It seems to generate terrain at the same speed, though.

!showcase of overworld

!showcase of overworld, top

!showcase of overworld, top, forest

!showcase of overworld, desert

!showcase of overworld, cherry grove

!showcase of overworld, blocky cave stuff

!showcase of overworld, from ocean surface

!showcase of overworld at night, sides of terrain

!showcase of overworld at night, top, surfaced ocean ruin and plains village

I didn't test the nether previously, but apparently it's also affected...

!showcase of nether roof above crimson forest

(yes, the nether roof has holes now.)

!showcase of nether, soul sand valley and crimson forest

!showcase of nether, basalt deltas

!showcase of nether, warped forest and bastion

The End (spoiler?)

the End is very cool as well...

!showcase of the End

...but also a bit broken.

!showcase of the End main island with pllars embedded in the island

It is fully possible (in theory) to beat the game with this mod.