🧱 Build Sandbox

Build Sandbox is a NeoForge mod for Minecraft 1.21.1 that adds a fully isolated creative building dimension where players can design structures safely without affecting their survival world.

✨ Features

🌍 Isolated Sandbox Dimension

• A separate flat creative world designed specifically for building and testing structures.
• No interaction with your survival world.

🎮 Game Mode Switching

• Use the command: /buildsandbox
• First execution:
  • Saves your survival position, dimension, and inventory
  • Teleports you to the sandbox dimension
  • Switches you to Creative mode
  • Loads your sandbox inventory (if available)
• Second execution:
  • Saves your sandbox position and inventory
  • Restores your survival inventory and position
  • Switches you back to Survival mode

🎒 Separate Inventories

• Survival inventory is stored independently from sandbox inventory.
• Switching worlds restores exactly what you had before entering.

🚫 Sandbox Restrictions

To keep the sandbox clean and controlled:

• ❌ No natural mob spawning
• ❌ No portals (Nether/End portals are blocked)
• ❌ No fire or portal generation allowed
• ❌ Fully isolated gameplay environment

🧠 Travel Protection

• Dimension travel is controlled internally by the mod.
• Players cannot freely escape or enter the sandbox without using /buildsandbox.

📦 How It Works

The mod uses a per-player data system:

• Stores:
  • Survival dimension
  • Survival position
  • Survival inventory
  • Sandbox position
  • Sandbox inventory

This ensures that switching between worlds is seamless and persistent.

🧪 Intended Use

Build Sandbox is perfect for:

• 🏗️ Testing builds safely
• 🧱 Designing structures without survival risk
• 🧪 Experimenting with creative ideas
• 🛠️ Server building practice environments

⚙️ Command

/buildsanbox

Toggles between:

• 🟢 Survival world
• 🟣 Sandbox creative world

🛑 Compatibility Notes

• Requires NeoForge 1.21.1
• Designed for both:
  • Singleplayer
  • Multiplayer servers

📁 Technical Details

• Custom dimension: buildsandbox:sandbox
• Flat world generator
• Fully custom inventory handling
• Event-based restrictions (portals, mobs)
• Player state persistence using UUID mapping

🚀 Planned Features (Optional ideas)

• No generation of structures in the Build Sandbox dimension
• No advancements (achievements) can be obtained inside the Build Sandbox
• GUI based selector in addition to the /buildsandbox command
• Build export system for saving and exporting creations
• Permission system for controlling access to sandbox features (server-side)

👤 Author

Developed by Wilkcraft

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🚀 Build freely, safely, and without affecting your survival world in a fully isolated creative sandbox dimension!

🧱 Build Sandbox

Build Sandbox is a NeoForge mod for Minecraft 1.21.1 that adds a fully isolated creative building dimension where players can design structures safely without affecting their survival world.

✨ Features

🌍 Isolated Sandbox Dimension

• A separate flat creative world designed specifically for building and testing structures.
• No interaction with your survival world.

🎮 Game Mode Switching

• Use the command: /buildsandbox

• First execution:

  • Saves your survival position, dimension, and inventory
  • Teleports you to the sandbox dimension
  • Switches you to Creative mode
  • Loads your sandbox inventory (if available)

  • Second execution:

    • Saves your sandbox position and inventory
    • Restores your survival inventory and position
    • Switches you back to Survival mode

🎒 Separate Inventories

• Survival inventory is stored independently from sandbox inventory.
• Switching worlds restores exactly what you had before entering.

🚫 Sandbox Restrictions

To keep the sandbox clean and controlled:

• ❌ No natural mob spawning
• ❌ No portals (Nether/End portals are blocked)
• ❌ No fire or portal generation allowed
• ❌ Fully isolated gameplay environment

🧠 Travel Protection

• Dimension travel is controlled internally by the mod.
• Players cannot freely escape or enter the sandbox without using /buildsandbox.

📦 How It Works

The mod uses a per-player data system:

• Stores:
  • Survival dimension
  • Survival position
  • Survival inventory
  • Sandbox position
  • Sandbox inventory

This ensures that switching between worlds is seamless and persistent.

🧪 Intended Use

Build Sandbox is perfect for:

• 🏗️ Testing builds safely
• 🧱 Designing structures without survival risk
• 🧪 Experimenting with creative ideas
• 🛠️ Server building practice environments

⚙️ Command

/buildsandbox

Toggles between:

• 🟢 Survival world
• 🟣 Sandbox creative world

🛑 Compatibility Notes

• Requires NeoForge 1.21.1
• Designed for both:
  • Singleplayer
  • Multiplayer servers

📁 Technical Details

• Custom dimension: buildsandbox:sandbox
• Flat world generator
• Fully custom inventory handling
• Event-based restrictions (portals, mobs)
• Player state persistence using UUID mapping

🚀 Planned Features (Optional ideas)

• No generation of structures in the Build Sandbox dimension
• No advancements (achievements) can be obtained inside the Build Sandbox
• GUI based selector in addition to the /buildsandbox command
• Build export system for saving and exporting creations
• Permission system for controlling access to sandbox features (server-side)

👤 Author

Developed by Wilkcraft

📄 License

This project is licensed under the MIT License - see the LICENSE file for details.

🚀 Build freely, safely, and without affecting your survival world in a fully isolated creative sandbox dimension!