A complete Overworld terrain overhaul for Minecraft 1.21.1 (NeoForge)

Terrahaul adds a new world type with a much taller world (Y −512 to 2031) and continental-scale terrain: vast plains and valleys, towering mountain ranges, great rivers, waterfalls, volcanoes, coral reefs and ruins, filled with procedural trees and living ambient effects.

🏔️ Mountains that look like real mountains

• Five mountain styles: pointed alpine horns, steep forested ancient ranges, long mountain walls, volcanic cones and gentle meadow highlands.
• Sharp summits and sawtooth ridgelines, flanks cut by deep V-shaped gullies, crags and ledges. The ground goes up, levels out briefly, and goes up again.
• Rare colossal massifs with summits reaching Y 1500–1900.
• Forests climb the slopes: spruce, fir and pine thin out into a ragged tree line, wind-bent krummholz and alpine meadows, with bare rock and snow on the highest peaks.
  
  

🌊 Water everywhere

• Great rivers 100–200 blocks wide, winding rivers, streams, fjords and coastlines.
• Lakes with living floors: forest, mountain, glacial, crater, marsh and great lakes.
• Real waterfalls and cascades: tall plunges over cliffs, fans and stepped cascades with pools.
• Deep oceans with trenches, vents and magma.
• Coral reefs laid out like real fringing reefs, kelp forests, seagrass meadows and sea grottos.
  
  

🌋 Landscapes and geology

• Plains, plateaus, valleys, hills, windswept uplands and wetlands.
• Canyons with layered rock strata, cliff overhangs, natural arches, hoodoos, spires and sea stacks.
• Volcanoes: rough, lopsided cones with chaotic craters, lava flows, forested flanks and burned zones.
• Geological provinces (granite, andesite, limestone, sedimentary, volcanic) with surface materials that change in natural patches and bands.
• Vanilla biomes, caves and ores still work, placed sensibly on the new terrain.
  
  

🌲 Procedural trees

• Every vanilla tree species is replaced by procedurally generated trees, with real roots, varied crowns and giant and ancient specimens.
• Fallen logs, dead trees, and forests with layers and clearings.
• Saplings grow the new trees too.
• Ground detail: pebbles, branches, twigs, pine cones, leaf litter, rocks and boulders.
  
  

🏚️ Ruins and trails

• Natural dirt trails wind across the land, with signposts, milestones and stretches of broken path lights.
• Broken houses and other trailside ruins (watchtowers, wells and more) in several variants.
• Sunken ruins on the sea floor: temples, city gates and drowned streets.
• Villages and temples are placed on sensible flat ground, and trial chambers and strongholds stay
  buried under the sea floor.
  
  

🍃 A living world

• A wind system with gusts and weather.
• Falling leaves, needles and cherry petals, and dust blowing across deserts and badlands.
• Grass, flowers and bushes sway in the wind.
• Waterfall spray, mist and foam, with roaring falls and rushing rapids.
• Higher clouds, so they no longer cut through the hills.
  
  

🧭 Finder command

/terrahaul find <landform> locates waterfalls, great rivers, lakes, volcanoes, canyons, peaks, arches, reefs, ruins and much more, and gives you a clickable teleport.

⚙️ Configuration

Almost everything can be adjusted or turned off, also in game via Mods → Terrahaul → Config:

• tree replacement, ground details, trails, vegetation and rock density;
• cloud height and distance fog;
• animations and vegetation sway;
• waterfall effects, and water sound volume and range.

📦 Requirements and installation

• Minecraft 1.21.1 with NeoForge 21.1.x
• Install on both client and server.
• Choose the Terrahaul world type when creating a new world (it is pre-selected by default).
• Dedicated server: set level-type=terrahaul\:terrahaul in server.properties before the world is created.
• The new terrain only appears in new worlds. Existing worlds keep their terrain.

🤝 Compatibility

• Sodium (0.8.x and 0.6.x): supported, including tall-world fog and vegetation sway.
• Iris: works with the matching Sodium version (Iris 1.8.12 needs Sodium 0.6.x). Shader packs draw their own sky, fog and clouds; vegetation sway is off while Iris is installed.
• Shine: works alongside it with Sodium.

⚠️ Good to know

• The taller world and detailed terrain make generation heavier than vanilla. A reasonably strong PC is recommended.
• /locate for very distant structures takes longer than in vanilla (about 20 seconds).
  
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