Cernution
Overview
6K, 1.21.5+ & 26.3, The Sancuary plateaus + Burried Treasure Structures + full featured vanilla structure additions
A 36km² custom Minecraft Survival Map, created by McMeddon. Plateaus surrounded by giant dune fields, which are surrounded by a giant mountain ring. The sanctuary plateaus in center, giant mountain chains around. Plains and lush forest in the north east, with mangroves & jungles further south. Badlands and red deserts in the south, and a giant tundra like sub polar steppe below the arctic region in the north. This world did quite a few leaps, changes to layouts, tree placements, and a technical development that allowed me to inject vanilla data into the chunks after export. To let your local minecraft version take over and generate vanilla structures with features again. Which was sadly not possible in versions after 1.16 with worldpainter. Additionally a technical addition was made to autofix stale or false nbt container data, to randomize loot and prevent stale vaults.
Size
Footprint
6,144 × 6,144
blocks, 37.7 km² at one block per metre
Edge to edge
- Happy ghast 28 min
- On foot 24 min
- Minecart 13 min
- Horse 11 min
- Elytra 3 min
Walking, a minecart on powered rails, an average horse and rocket-boosted elytra.
Sizes in the library 76% smaller than this
Most worlds are 4K (88 of them). The largest is MCS SMP Season 3 Server Map #S3 at 9K.
Biome composition
Shares are measured across the built map. Past its edge the world keeps generating normal vanilla Minecraft chunks, so biomes missing from this list can still be found out there.
Land 55.4% of map
-
Plains 23.6% -
Beach 9.6% -
Desert 9.3% -
Stony Peaks 8.1% -
Stony Shore 5.8% -
Wooded Badlands 5.7% -
Swamp 4.9% -
Windswept Gravelly Hills 4.7% -
Flower Forest 4.0% -
Mangrove Swamp 2.7%
18 more 21.6%
-
Jungle 2.5% -
Dappled Forest 2.1% -
Savanna 2.0% -
Snowy Taiga 1.8% -
Cherry Grove 1.7% -
Dark Forest 1.4% -
Birch Forest 1.4% -
Sparse Jungle 1.4% -
Pale Garden 1.2% -
Snowy Slopes 1.2% -
Snowy Plains 1.1% -
Meadow 1.1% -
Taiga 0.9% -
Forest 0.8% -
Jagged Peaks 0.5% -
Mushroom Fields 0.3% -
Old Growth Pine Taiga 0.2% -
Frozen Peaks <0.1%
Water 43.6% of map
-
Ocean 55.8% -
Lukewarm Ocean 22.7% -
Warm Ocean 9.1% -
River 8.7% -
Cold Ocean 3.7% -
Frozen River <0.1%
Structure coverage
Counted inside the built map. Past its edge the world keeps generating normal vanilla Minecraft chunks, so structures not confirmed here can still generate out there.
Surface 6/8 confirmed
- Abandoned camps Not checked
- Desert pyramids Included
- Igloos Included
- Jungle pyramids Included
- Pillager outposts Included
- Swamp huts Included
- Trail ruins Included
- Woodland mansions Searched, not found
Underground 6/6 confirmed
- Amethyst geodes Included
- Ancient cities Included
- Dungeons / monster rooms Included
- Mineshafts Included
- Strongholds Included
- Trial chambers Included
Ocean 3/4 confirmed
- Buried treasure Included
- Ocean monuments Searched, not found
- Ocean ruins Included
- Shipwrecks Included
Portal structures 1/1 confirmed
- Ruined portals Included
Settlements 1/1 confirmed
- Villages Included
Loot tables
Which of the game's loot tables can turn up on this map, read from the world's own files. Confirmed means the scan found the table itself; not observed means the structure carrying it was not seen in this export.
Counted inside the built map. Past its edge the world keeps generating normal vanilla Minecraft chunks, so tables not seen here can still turn up out there.
Chest loot 16/22 confirmed
- Abandoned mineshaft Included
- Ancient city Included
- Buried treasure chest Included
- Desert pyramid Included
- End City treasure Not observed
- Igloo chest Not observed
- Jungle temple Included
- Jungle temple dispenser Not observed
- Nether fortress bridge Not observed
- Pillager outpost Not observed
- Ruined portal Included
- Shipwreck map Included
- Shipwreck supply Included
- Shipwreck treasure Included
- Simple dungeon Included
- Spawn bonus chest Included
- Stronghold corridor Included
- Stronghold crossing Included
- Stronghold library Included
- Underwater ruin (big) Included
- Underwater ruin (small) Included
- Woodland mansion Not observed
Village chest loot 14/16 confirmed
- Village armorer Included
- Village butcher Included
- Village cartographer Included
- Village desert house Included
- Village fisher Included
- Village fletcher Included
- Village mason Not observed
- Village plains house Included
- Village savanna house Included
- Village shepherd Not observed
- Village snowy house Included
- Village taiga house Included
- Village tannery Included
- Village temple Included
- Village toolsmith Included
- Village weaponsmith Included
Structure loot 2/2 confirmed
- Abandoned camp loot Included
- Trial chamber loot Included
Archaeology 1/1 confirmed
- Archaeology loot Included
What is new in Cernution
- Technical: Created a post-export injection tool for vanilla structures.
- Technical: Created a post-export NBT, container, and automatic vault fixer to repair faulty vaults and containers and assign random seeds to loot tables.
- Achieved full structure parity through post-export chunk injection and local generation.
- Structure injection also makes maps from loot chests usable.
- Vanilla mob spawning behavior, including pillager spawning, works in injected vanilla structures.
- Updated swamp huts with a minor fix.
- Added 50+ new rare beach structures for sandy, muddy, and rocky beaches.
- Added sandstone beneath sand dunes for parity.
Show all 15 changes
- Further adjusted swamp density, placement, and insert styles.
- WM: Changed biome distribution, widened the core, reduced its impact on oceans, and increased its impact on land and slopes.
- WM: Further adjusted swamps to fit the new system.
- WM: Updated death masks for the default biome to include more biome types with less overlap.
- WM: Cleaned up masks.
- WM: Added new sulfur caves and a new cave layout.
- WM: Added new castle placement masks.
What’s included in Cernution?
See what this Minecraft world contains. Results combine MCA Selector findings, chunk data, level.dat, and manually placed structure pins.
Beta edition: some results are still being verified.
- Seed
- Unknown
- World type
- Unknown
DETAILED INVENTORY Explore the world contents
Search and filter the registries found in this world.
Open the inventory Close the inventory
Explore the world contents
Search and filter the registries found in this world.
Biomes
Biome types found in the existing Overworld.
Structures
StructuresSurface and underground structure types evidenced by existing starts or reviewed markers.
Loot types
Loot typesLoot families evidenced by existing loot-table references.
Animals
AnimalsAnimal types observed in the existing world.
Blocks
BlocksReference inventory only. Missing crafted or dimension-specific IDs are not automatically survival failures.
Cave biomes
Cave biomesVanilla cave biomes found in the existing Overworld. Custom cave types have no biome ID in a save, so this scan cannot detect them.
Key compatibility details
The most relevant survival features, grouped by category.
No features match these filters.
This report inventories existing save data without loading, generating, or changing chunks. Vanilla terrain may still generate beyond the existing map boundary.
Inspect the world data
The world settings Minecraft stores in level.dat, as captured when this world was scanned. Read only, and player data is never published.
No fields match that search.
Questions about Cernution
- What is Cernution?
-
Cernution is a hand-made survival world of 6,144 × 6,144 blocks, made with WorldPainter, World Machine, Gaea, Axiom and WorldEdit, built for Minecraft Java 26.3. You download the world folder and play it like any other save, in singleplayer or on your own server.
- How big is Cernution?
-
6,144 × 6,144 blocks, so about 38 million blocks of surface. Walking from one edge to the other takes roughly 24 minutes at normal walking speed. The terrain runs from Y -64 to Y 320.
Outside that area the world keeps generating normal vanilla Minecraft chunks, so you never hit a wall, you just leave the built part behind.
- Which Minecraft version does Cernution need?
-
Cernution is made for Minecraft Java 26.3 and opens in 1.21.5 and later. Between the two, anything added after the release you load it in is removed or replaced (new biomes load as plains), so 26.3 or newer shows the world as built. Releases older than 1.21.5 cannot open it.
Bedrock players need a converted copy. See the Bedrock notes in the FAQ.
- Which biomes are in Cernution?
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37 in total. The land is mostly Plains (23.6%), Beach (9.6%), Desert (9.3%) and Stony Peaks (8.1%), counted as shares of the land rather than of the whole map.
Water covers 43.6% of the map, and land 55.4%.
The full breakdown is further up this page, with every biome and its share.
- Which structures are in Cernution?
-
17 of the 20 structure types the scan checks are confirmed present: surface (6/8), underground (6/6), ocean (3/4), portal structures (1/1) and settlements (1/1).
Not confirmed: Abandoned camps (not checked), Woodland mansions (searched, not found) and Ocean monuments (searched, not found). "Searched, not found" means the scan looked and came up empty; "not checked" means it has not been looked for yet.
The structure list above names every one of them.
- Is Cernution ready to play in survival?
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Yes. A scan of the world file confirms loot tables, structures, animals and ores, so the survival loop runs from the first night: chests hold the game's real loot tables, mobs spawn as they do anywhere else, and you can mine, farm and build without adding anything. It plays in vanilla Minecraft, with no mods, no datapacks and no creative mode.
The world contents report at the bottom of this page holds the item-by-item detail.
- Where do I download Cernution?
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From the download link on Google Drive, also on the button at the top of this page.
Also available: the PlanetMinecraft project page, which carries the release notes and the known issues for this particular build.
- What is new in Cernution?
-
Every world is built on the one before it, and Cernution brought 15 logged changes into the line: new terrain, new assets and fixes to the generators that made it.
From its list:
- Updated swamp huts with a minor fix.
- Added sandstone beneath sand dunes for parity.
The full list is on this page. These are the world's own additions, not patches released after it, so an older download is not missing them.
- Can I look at Cernution before downloading it?
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Yes. Open it in the 3D explorer and fly the real terrain in your browser, with the biomes, the caves and the marked structures. Nothing to install.
How do I install Cernution on Java Edition?
- Unpack the archive you downloaded from Google Drive.
- Open your saves folder. On Windows press
Win+Rand enter%appdata%\.minecraft\saves. On macOS it is~/Library/Application Support/minecraft/saves, on Linux~/.minecraft/saves. - Move the unpacked folder in. It must be the folder that contains
level.dat, not a folder wrapping it. - Restart Minecraft on 1.21.5 or newer and pick the world in singleplayer.
Can I play it on Bedrock, or on a server?
Bedrock needs a converted .mcworld copy, and converted worlds carry their own
quirks around spawn, chests and villagers.
For a server, drop the world folder in as the server's world and start it.
What may I do with it?
The worlds are released under CC BY-NC 4.0. The Rights panel on this page lists what that allows and how to credit it.