VIP Plugins Iris - Dimension Engine

Custom world generation you can design yourself
Iris replaces Minecraft's world generator with JSON packs you can edit and share. Install a ready-made pack for overhanging cliffs, floating islands and rivers that end in waterfalls, or build your own. Iris Studio opens a test world beside VS Code, which suggests and explains every field. Each save regenerates new terrain, and a map window previews biomes, rivers and noise in 2D and 3D.

What a pack can build
Terrain and water

• Overworld, floating island and nether-style dimensions
• Several dimensions stacked in one world
• Overhangs, ledges and fissures in each biome
• Winding rivers with waterfalls, ponds and river mouths
• Caves, underground rivers and sea caves
• Cenotes, lava tubes and fault lines
• Biomes with their own sky, fog and water colours
• Height, biomes and surface blocks painted from PNG maps

Structures, mobs and loot

• Saved builds and multi-piece jigsaw structures
• Seeded trees, rock formations and ruins
• Vanilla, datapack and mod structures
• A structure deny list for each dimension
• /locate and eyes of ender find Iris structures
• Custom mobs with gear and loot tables
• Mob spawns set by time, weather and light

Build your own dimension
Studio
Closing a Studio world deletes the world and keeps your pack.

• VSCode workspace with JSON schemas
• Saving a file updates new terrain in the Studio world
• Map window with biomes, regions and rivers, plus a 3D terrain view
• Noise browser and a PNG image map importer
• Object wand with paste and undo
• Import a WorldEdit selection as an object
• Build jigsaw structures in game and export a datapack
• Pack validation and a version compatibility report

Running it on a live server

• Create and remove Iris worlds in game
• Load and unload worlds without a restart, on Folia too
• Pregenerate a square area, with pause and live progress
• Pack updates only change new chunks, blended into old ones
• Staged pack updates take effect after a restart
• Find and teleport to a biome, structure or river
• Swap any world, even the main one, for an Iris pack on restart

Getting started

1. Put the Iris jar in plugins/ and start the server once.
2. Download a pack with /iris download pack=overworld or pack=underworld.
3. Restart once so the server loads the pack's biomes and height range.
4. Create a world and teleport into it.

Commands and permissions
Commands
Aliases: /ir and /irs for /iris
Permissions
Add center=me to pregenerate around yourself. A pack update takes world=, pack= and confirm=true. Tree felling works in survival once the server turns it on.

Compatibility and limits
Runs on: Paper, Purpur, Leaf, Folia, Canvas, Spigot
Minecraft: 26.1.2 to 26.3 on Java 25
Optional: PlaceholderAPI, WorldEdit, Multiverse-Core

• Platforms Replacing an existing world needs a Paper-family server, and so does async pregeneration. The same engine also ships as Fabric, Forge and NeoForge mods for 1.21.1 and 26.1.2 to 26.3.
• Integrations Packs can place content from Nexo, ItemsAdder, MythicMobs and seven other plugins. PlaceholderAPI gets biome, region and pregeneration placeholders.
• Languages English plus 17 translations. Set one for the server or let each player pick.
• Network Downloads libraries on first start and checks GitHub for plugin and pack updates. Packs and languages are fetched only when you ask. Debug reports upload to mclo.gs unless you add upload=false.
• Limits Pack edits and updates only affect chunks generated afterwards. Pregeneration does not resume after a restart. Players cannot join until startup checks finish.

Optional client mod
The plugin works without the client mod. Players who want it install the Fabric, Forge or NeoForge jar on their own client.

• Pregeneration HUD on H with progress and time left
• A biome map on M that you can pan and zoom
• Overlay on J with the biome, region and height you aim at
• A notice when a Studio save reloads or fails

You can download the mod from CurseForge or Modrinth.