Duplicate Finder and Remover is a Blender add-on designed to find, review, and remove duplicate or overlapping mesh objects in your scene.

It is ideal for cleaning complex imported CAD scenes before rendering, optimization, or export to real-time engines such as Unity, Unreal Engine, Three.js or other interactive 3D pipelines. By removing hidden duplicate meshes and overlapping geometry, you can make your Blender projects lighter, cleaner, and easier to prepare for production.

It is especially useful for CAD-based workflows, where imported files often contain repeated geometry, overlapping copies, or nearly identical meshes that unnecessarily increase scene complexity and file size.

The add-on can scan selected objects, visible objects, or the entire scene. It detects both exact duplicates and similar objects by analyzing mesh geometry, object bounds, shape characteristics, and sampled surface distance. Results are grouped directly in the 3D Viewport sidebar, allowing you to quickly inspect each group, isolate it, select and frame it, hide or show individual objects, and delete only what you no longer need.

Key Features

• Scan selected, visible, or all mesh objects in the scene.
• Detect exact geometry duplicates.
• Find similar objects with adjustable similarity settings.
• Strict, Balanced, and Loose detection modes.
• Compare evaluated meshes with modifiers applied.
• Review results in organized duplicate groups.
• Temporarily isolate groups for easier inspection.
• Select, frame, hide, show, or delete individual objects.
• Remove all exact duplicate groups automatically with confirmation.
• Optionally purge unused mesh data when deleting duplicates.

Example Use Cases

• Clean up imported CAD projects that contain overlapping duplicate meshes.
• Prepare architectural, industrial, or technical models for Unity or Unreal Engine.
• Reduce scene weight before rendering or exporting.
• Review similar objects manually before deleting them.
• Organize complex Blender scenes by removing unnecessary repeated geometry.

Duplicate Finder is a practical cleanup tool for artists, technical artists, architects, visualization specialists, and anyone working with CAD imports or heavy mesh scenes in Blender. It helps you identify hidden duplicates, reduce unnecessary geometry, and prepare cleaner assets for real-time 3D, rendering, and production workflows.

Compatibility

• Compatible with Blender 5.2 and 5.1.x

Installation

1. Download the addon (.zip file)

2. Open Blender

3. Go to Edit → Preferences → Get Extensions

4. Click Install from disk and select the ZIP file
   
   

5. Enable DUPLICATE FINDER (if not already enabled)

Updating the Addon

As long as sales allow us to support this addon, we intend to continue updating it with new features and compatibility with future versions of Blender.

To install updates or new versions:

1. Remove the addon from Blender Preferences

2. Restart Blender

3. Install the updated version

You may also find useful our add-on for importing STEP / STP files into Blender:

STEP IMPORTER for Blender – Import STEP / STP CAD Files

You may also find useful our other add-ons for CAD-based workflows:

Hole Remover is a Blender add-on that detects and removes circular through-holes in imported CAD meshes, reducing polygon count for easier editing, faster rendering, and real-time 3D workflows.

Link: Hole Remover - Clean CAD-style through-holes from imported meshes