Dimensions — Minecraft Bedrock Preview Addon

Made by FonnyFofo for WanMine

Testing custom dimensions, scripted cinematics, procedural generation and world manipulation in Minecraft Bedrock Preview — building a multi-dimension travel system from scratch.

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Dimensions

Name	Description
Umbra Depths	Warden-inspired underground realm. Sculk floor, deepslate ceiling, pillar forest, 4 ruin sites, and a central altar. Pre-built on world load.
Aether Expanse	Infinite floating islands generated chunk by chunk as you explore. Three island biomes: Meadow, Crystal, Bone.
Terra Genesis	Up to 8 player-configured worlds, each in its own dedicated dimension. Choose biome, ground block, mountain height, tree density, water level, caves, ores, and more.

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Requirements

• Minecraft Preview — version 26.x or higher (tested on 26.20.x)
• The following experimental toggles must be enabled in world settings:
  • ✅ Beta APIs
  • ✅ Upcoming Creator Features
  • ✅ Custom Dimensions (if listed separately)

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Installation

1. Open your world in Minecraft Preview
2. Go to World Settings → Add-Ons → Behavior Packs
3. Create a behavior pack folder and place main.js inside a scripts/ subfolder, with manifest.json at the root
4. Enable the pack and make sure the experimental toggles above are active
5. Load the world — use /travel:portal to open the travel menu

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Commands

Command	Permission	Description
/travel:portal	Any player	Open the dimension travel menu
/travel:reset_umbra	GameDirectors	Rebuild Umbra Depths from scratch
/travel:reset_aether	GameDirectors	Clear Aether generation cache
/travel:reset_terra	GameDirectors	Wipe all Terra worlds

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Notes

• This is experimental. The Custom Dimension API is a beta feature — things may break between Preview versions and generation is not optimized for large-scale use.
• This is a personal testing project, not a polished release. Expect rough edges.
• Umbra Depths is built once on world load and cached — rebuilding requires /travel:reset_umbra
• Aether islands generate live as you explore using deterministic noise, so shape is consistent per-seed
• Terra worlds persist across sessions via dynamic properties; each occupies its own dimension slot (terra:world_0 through terra:world_7)
• Red/wrong fog in custom dimensions can be a issue i have planned to fix.

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License

© FonnyFofo / WanMine. All rights reserved.
Do not redistribute, reupload, or modify without explicit permission.