From a city block to a whole continent, in Minecraft.
Live status

System

CPU
RAM
Disk
CPU RAM history

Build

, estimated size

Workers idle

Idle. Start a generation to see live workers here.

Log

move the mouse over the map
Arnis by louis-e · Meld by Teddy563

Generate

planned queued running merged failed

Settings

1:10 · 1 block = 10 m · a 1 km city = 100 blocks wide
1 / 2 / 4 / 8 / 16 · default 4. 8 and 16 auto stream-to-disk (testing the parallel engine).
Terrain shaping
OSM source · timeout i
Generation performance i
Keep workers × threads at or under your CPU cores. Over it is slower. On 24 cores, 12×2 and 8×3 are about the same.
Props & 3D models i
Schematic props i
3D models (downloaded)
Real 3D models from 3DMR / Wikimedia placed at landmarks. Off = skip the downloads entirely.
Climate (Köppen) i
Tree sizes i
Farmland texture i
Relative shares for the selected profile.
Classic: all Farmland, one uniform sheet of crops. Nothing is sent to the generator and the render is unchanged.
Farm plots i
Pattern size i 100%
The world targets the version you pick. A NEWER client opens it fine; an OLDER one does not. Convert it with chunker.app instead.
For LOD mods (Voxy, Distant Horizons) and map renderers only. Minecraft itself re-lights chunks as you load them, so in normal play you will not see a difference; it is not a fix for a world that looks dark, and it does not affect buildings.
Auto-centers on the selection (region corner, 4 cells meet).

Border & zones servers i

Rings: actual border, soft (+km safe edge), hard (+km wall / trim), lime internal line. Exports regions.yml + point files + border.sk to <project>/border/.
⚙ Ring, margin & script settings
Ring & margin
Server script (border.sk)
border.sk needs only Skript + SkBee. The bounce at the soft ring (exit: deny) and the Entering/Leaving titles are WorldGuard region flags, no Skript addon involved.

Server setup servers i

Project & world i

🧪 Region format (experimental)
📦 Export & compression
Advanced compression

Selection / search

When you draw a rectangle/polygon (or search a country):
Draw a rectangle/polygon on the map, or search.

Edit & retry i

Elevation lock none

,

Prepare data i

Cache

Shared map data (OSM + terrain + land cover), reused by every world. Lives at:
OSM
Terrain
Land cover
PBF downloads

Data pack i

Draw or search an area, then check coverage.
Preview elevation on the map (hillshade):
Downloaded packs

OSM data pack i

Draw or search an area, then check OSM coverage.
Bake a local .pbf and generation never calls Overpass at all i
Or get a .pbf yourself from Geofabrik

Buildings (Overture) i

Building buildings? Pre-warm Overture so cells don't stall on a cold fetch.

Subregions / worlds

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meldmc.com
Not affiliated with Mojang AB or Minecraft. Built on the open source Arnis generator.