Blastback

Explosions happen. The world rebuilds.

Blastback is a configurable Minecraft datapack that records blocks before explosions and reconstructs damaged areas afterward—one block at a time.

Features

• Restores exact block states
• Preserves chest inventories and block-entity data
• Supports overlapping and chained explosions
• Combines nearby explosions into one restoration group
• Suppresses explosion-generated block and container drops
• Leaves pre-existing dropped items untouched
• Pauses rebuilding while nearby explosions remain active
• Supports configurable placement speed and intervals
• Provides per-dimension explosion controls
• Includes an interactive settings menu
• Preserves pending restoration across restarts and chunk unloading
• Uses an event-driven scheduler with minimal idle processing

Restoration animations

Choose how destroyed areas rebuild:

• Bottom-up
• Top-down
• East-to-west
• West-to-east
• North-to-south
• South-to-north
• Outside-in
• Inside-out
• Random

Supporting blocks are restored before torches, grass, vegetation, redstone, attachments, and fluids. These dependent blocks may therefore appear later in the animation.

Supported explosions

Blastback detects and rebuilds damage caused by:

• TNT
• TNT minecarts
• Creepers and charged creepers
• Beds in invalid dimensions
• Respawn anchors in invalid dimensions
• End crystals
• Ghast fireballs
• Wither skulls

Each source can be controlled separately for the Overworld, Nether, End, and custom dimensions.

Settings

Administrators with permission level 2 or higher can open the settings menu with:

/function erb:admin/settings

The optional Blastback Settings book can be obtained with:

/function erb:admin/give_settings

You can configure:

• Rebuild delay
• Blocks placed per interval
• Placement interval
• Restoration animation
• Explosion sources
• Dimension profiles
• Chain-consumed TNT restoration
• Rebuild or item-conversion mode
• Master enable/disable switch

Players can view read-only status information with:

/trigger erb.status

Performance notice

Hotfix 3 replaces the previous always-running generated workers with an event-driven scheduler. Expensive capture, restoration, verification, and cleanup work remains dormant when Blastback has nothing to process.

Large or highly simultaneous explosions can still temporarily increase server load because Blastback prioritizes reliable capture and restoration.

Credits

Inspired by Scommander’s original Explosion Rebuilder Datapack. Blastback is an independently developed modern rewrite containing no code or assets from the original project.