WorldEdit Selection Overlay (Fabric)

Make your WorldEdit selections visible, readable, and predictable.

Download WorldEdit

What is this?

WorldEdit Selection Overlay is a client-side visual addon that shows your selection exactly as it is before you run any destructive commands.

No more guessing shapes.
No more wrong sizes.
No more accidental //set air.

You see everything in advance.

Why you actually need this

WorldEdit gives you power, but almost no visual feedback.

This mod fixes that:

• See the real shape of your selection
• Read dimensions directly in-game
• Inspect blocks before editing
• Isolate specific block types inside a selection
• Avoid mistakes that cost time

In-Game Preview

The overlay renders your selection directly in the world:

• Exact bounds
• Real geometry
• Clear corner points

Built-in Dimension Ruler

Measure selections like in CAD tools:

• Clean readable size labels
• Always visible from your current angle
• Can follow your camera or stay fixed

Inspect Before You Edit

Open the block viewer and see exactly what is inside:

• All blocks in the selection, including air
• Grouped and searchable
• Fast filtering with #air, #fluid, and #solid
• Chunk-aware loaded/unloaded counts
• Fluid entries use bucket icons for easier reading

Perfect before using:

• //replace
• //set
• //stack

Block Isolation Mode

Need to find only one material inside a huge selection?

Select one or more block types in the block viewer. The mod hides every other block inside the selected WorldEdit region on the client only, leaving the real world untouched.

Useful for:

• Finding hidden ores, liquids, air pockets, containers, or mistakes
• Checking what a //replace command will affect
• Inspecting complex builds layer by layer
• Viewing selected blocks with their normal textures

Details:

• Multiple block types can be selected at the same time
• Selected block groups stay pinned above the rest of the list
• A reset button clears the isolation selection quickly
• Fluids and fluid-like rendered content are hidden when they are not selected
• The selection boundary and ruler can stay visible while the internal grid is hidden
• Works even when the normal selection overlay visibility is disabled

Everything is visual only. Hidden blocks still exist, still collide, and are never changed by the mod.

Features

• Real-time selection overlay
• Two render styles: Blocky / Smooth
• Adaptive performance for large selections
• Optional diagonals for cuboid shapes
• Built-in dimension ruler
• Block inspection screen
• Client-side block isolation mode
• Fluid-aware rendering and bucket icons
• Fully configurable UI

Supported Selection Types

• Cuboid
• Polygon 2D
• Ellipsoid / Sphere
• Cylinder
• Polyhedron / Convex

Works with everything WorldEdit sends via CUI.

Controls

All keybinds are configurable.

Compatibility

• Singleplayer
• Fabric + WorldEdit
• Paper / Spigot / Purpur if WorldEdit CUI data is available
• Sodium support for block and fluid isolation rendering

If the server does not send CUI data or supported WorldEdit selection updates, the overlay cannot know what to render.

Important

• Client-side only, safe to install anywhere
• Does not modify the world
• Hidden blocks are only hidden visually
• Requires WorldEdit selection data

Requirements

• Minecraft 1.21.11
• Fabric Loader
• Fabric API
• WorldEdit

Installation

1. Install Fabric Loader
2. Install Fabric API
3. Drop the mod into /mods
4. Launch the game

Quick Start

1. Make a WorldEdit selection
2. Press O to configure the overlay
3. Press B to inspect blocks
4. Use the checkboxes in the block viewer to isolate specific blocks

Troubleshooting

• Make sure WorldEdit is installed
• Make sure CUI is enabled when playing on servers that require it
• Rejoin the world if the overlay does not appear
• If using Sodium, restart the game after replacing the mod jar