Merge by Distance in Blender: 3D Mesh Optimization

Published on January 07, 2026 | Translated from Spanish
Close-up view of a 3D mesh in Blender showing vertices merging with the Merge by Distance command active, highlighting geometry simplification.

Merge by Distance in Blender: 3D Mesh Optimization

The Merge by Distance tool in Blender is essential for debugging and optimizing 3D models, automatically merging overlapping or extremely close vertices. This resolves common issues when importing files or after intensive modeling operations, ensuring clean and efficient meshes 🛠️.

How it Works

Activated via the M shortcut or the mesh menu, Merge by Distance scans selected vertices and merges those within a configurable distance threshold. This process corrects duplicate geometry, overlapping faces, and unconnected edges, refining the model's topology. Users can adjust sensitivity to balance precision and simplification 💡.

Key Advantages of the Tool:
  • Eliminates redundant vertices that cause visual artifacts in renders
  • Prevents errors in animation and complex modifier applications
  • Improves efficiency in workflows with heavy models
Without Merge by Distance, a model can turn into a chaos of overlapping geometry, unusable for serious projects.

Applications in Real Projects

This feature is crucial in 3D printing, where models must be free of duplicates to avoid print failures. In video game development, it reduces unnecessary polygons, optimizing real-time performance. Additionally, it prepares surfaces for digital sculpting and texturing, ensuring uniformity and avoiding distortions 🎮.

Highlighted Use Cases:
  • Cleaning models imported from other design software
  • Preparing assets for game engines like Unity or Unreal Engine
  • Optimizing meshes for physics simulation or batch rendering

Impact on Productivity

Ignoring this tool can result in corrupted meshes that slow down the software and produce undesired results. By integrating Merge by Distance into your routine, you ensure clean and professional models, ready for any 3D application. The investment in geometric cleanup always pays off in quality and efficiency ⚡.