🏗️ Create: Design n' Decor Legacy Fix 🔧

Create: Design n' Decor Legacy Fix is a compatibility-focused fork of Design n' Decor for Minecraft 1.20.1, Forge, and Create 6. 🚂⚙️

This project exists to help older worlds survive the transition from previous Design n' Decor versions to newer Create 6-based environments by restoring missing registry entries and preserving legacy decorative and industrial content. 🏭🏠

Many long-running Minecraft worlds rely on exact registry IDs. When blocks are removed, renamed, or reorganized, worlds may lose decorations, machines, and builds that took hours or years to create. ⛏️💔

Create: Design n' Decor Legacy Fix aims to keep those worlds alive. ❤️

✨ What the mod does

This fork restores and preserves legacy Design n' Decor content while maintaining compatibility with the modern Create 6 ecosystem.

🔄 Legacy Registry Restoration

Restores approximately 453 legacy block and item registrations from older Design n' Decor versions.
Preserves old design_decor:<name> registry references used by existing worlds.
Remaps compatible IDs from:

design_decor:<name>

to:

dndecor:<name>

when an exact replacement exists. 🔁

Mappings are deliberately conservative:

✅ Exact compatible replacements are restored.
✅ Matching registry paths are preserved whenever possible.
❌ Unknown entries are not replaced with unrelated blocks.

The goal is world preservation, not forced conversion. 🌎

🧱 Restored Content

This fork restores many legacy decoration and industrial building families, including:

🏰 Castel Blocks

Castel bricks
Castel tiles
Slabs
Stairs
Walls

🎨 Colored Decoration Systems

Colored metal plates
Colored metal sheets
Wallpapers

⚙️ Create Integration Content

Material variants of crushing wheels
Millstones
Boilers
Large chains

🏭 Industrial Decorations

Catwalks
Railings
Lamps 💡
Lights
Floodlights
Screws
Bolts
Containers

🚦 Legacy Sign Collection

Numbers
Letters
Warning signs
Symbols
Decorative signs

🏗️ Standalone Blocks

Industrial gears
Gas tanks
Framed glass
Industrial floors
Supports
Utility blocks

And many more restored legacy registrations. 🛠️

👥 Who is this for?

This fork is intended for:

✅ Minecraft 1.20.1 worlds
✅ Forge users
✅ Create 6 migration projects
✅ Existing worlds that previously used older Design n' Decor versions
✅ Servers that want to preserve years of construction progress 🏙️

If you are starting a brand-new world with no legacy Design n' Decor content, the upstream version may be a better choice. 🌱

📦 Requirements

Required:

🟩 Minecraft 1.20.1
🔥 Forge 47.x
⚙️ Create 6.0.6–6.0.x

Development is currently tested with:

Minecraft: 1.20.1
Forge: 47.4.8
Create: 6.0.8
Java: 17

🚨 Installation & World Migration

⚠️ BACK UP YOUR WORLD FIRST! ⚠️

Registry migration affects how Minecraft resolves saved blocks and items. A world saved after migration may not safely return to the previous mod version.

Recommended migration process:

💾 Create a complete backup of your world.
🗑️ Remove the existing Design n' Decor JAR.
📥 Install Create: Design n' Decor Legacy Fix.
⚙️ Install compatible Forge and Create 6 versions.
📜 Check the Forge log for unresolved mappings.
🧪 Load a copy of your world first.
🏗️ Verify important builds, machines, inventories, and contraptions.
✅ Only replace your main world after successful testing.

⚠️ Important

This fork uses the same dndecor mod ID.

Do not install multiple Design n' Decor builds together.

Example:

❌ Incorrect:

mods/
├── dndecor.jar
└── dndecor-legacyfix.jar

✅ Correct:

mods/
└── dndecor-legacyfix.jar

🔧 Compatibility Notes

The compatibility system focuses on legacy registry preservation.

Features:

✅ Legacy block and item ID restoration
✅ Safer world migration
✅ Create 6 compatibility
✅ Preservation of existing builds

Limitations:

Exact behavior parity with every historical version is not guaranteed.
Resource packs, scripts, or addons depending on old implementation details may require updates.
Unsupported registry entries will remain unresolved rather than being incorrectly replaced.

If Forge reports a missing mapping:

Please include:

📌 Missing registry ID
📌 Previous Design n' Decor version
📌 Forge log excerpt
📌 Minecraft version

when reporting an issue.

🛠️ Building From Source

Requirements:

☕ Java 17
📦 Gradle wrapper included

Build:

.\gradlew.bat build

Output:

build/libs/

Run automated tests:

.\gradlew.bat runGameTestServer

🚧 Project Status

Current status:

🟡 Beta Compatibility Release

The main restoration work is complete, but compatibility testing continues.

Please:

💾 Keep backups
🧪 Test on copied worlds first
🐛 Report unresolved legacy registrations

Every report helps improve compatibility for more worlds. 🌎✨

❤️ Credits

Original Design n' Decor:

👤 Luna
👥 Original contributors

Create: Design n' Decor Legacy Fix:

🔧 Maintained by RSlover521

Original project credit and asset ownership are preserved.

📜 License

This project contains original code changes and utilizes assets from the original Design n' Decor project.

Please refer to the repository license files and distributed metadata for:

Original asset licenses
Code licenses
Fork modifications

Respect the original creators and their work. ❤️