Orbis Novus Lite

Six terrain world types as a plain datapack. You need no mods and no loader, so it runs on an unmodded game, a vanilla server or any loader.

Each world type is made only from vanilla density functions and noise settings. Caves, ores, structures and biomes are all vanilla. Lite is the lighter cousin of Orbis Novus: Terrain: it has no erosion or river networks, and fewer world types.

World type	id	What it looks like
ON Lite: Rolling Hills	orbisnovus_lite:rolling	Green rolling hills, forests and rivers.
ON Lite: Alpine	orbisnovus_lite:alpine	Ridged snowy peaks over pine valleys.
ON Lite: Mesa Steps	orbisnovus_lite:mesa	Terraced badlands plateaus and canyons.
ON Lite: Archipelago	orbisnovus_lite:archipelago	Islands in a shallow sea.
ON Lite: Old Amplified	orbisnovus_lite:amplified	Towers and gorges in the old amplified style.
ON Lite: Floating Isles	orbisnovus_lite:floating_isles	Grassy islands drifting high over a shallow sea.

It comes for 26.1.2 and 1.21.1, with an optional resource pack that gives the world types their names on the World Type button.