Developer Released CatPin Add-on for Blender
The new tool prepares complex 3D models for printing by automating the creation of assembly joints and sockets.
Updated on Oct. 5, 2026 in Software
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Software developer Alex Sokol has released the CatPin add-on for Blender, a utility designed to simplify the preparation of 3D models for FDM and resin printing. The tool is available now for users running Blender versions 4.2 through 5.2.
Why it matters
CatPin addresses common challenges in 3D printing by enabling the division of large meshes into manageable, printable parts with integrated mechanical fasteners. This automation streamlines the post-processing workflow for users who must manually prepare complex geometries.
CatPin supports Blender versions 4.2 through 5.2, enabling users to split meshes into components with pins and sockets. Unlike standard manual methods, this tool preserves the original mesh data during the export process.
The players
Alex Sokol
An independent software developer focused on creating tools for the Blender 3D modeling ecosystem.
Blender
An open-source 3D computer graphics software suite widely used for modeling, rendering, and animation.
The details
The CatPin add-on operates by allowing users to draw cut lines or place points directly on a 3D model to define where it should be divided. It also features a Polygonal Cut tool, which lets designers isolate and remove specific small areas from a mesh to create sockets. These cuts facilitate the addition of pins for assembly, which is essential for printing objects larger than a single build volume.
Timeline
October 5, 2026: Official release of the CatPin add-on.
The Tech Race
CatPin enters a crowded market of third-party Blender utilities aiming to reduce the friction between digital design and physical production. By automating joint creation, the tool competes with established manual slicing workflows that have historically required extensive secondary modeling steps.
Users can immediately deploy CatPin to prepare models for FDM and resin printers within the Blender interface. The tool requires an installation of Blender 4.2 or higher to function.
The takeaway
This release simplifies the mechanical preparation phase of 3D printing by automating complex mesh splitting tasks. Keep an eye on the official GitHub or Blender community forums for future version updates that may extend support beyond the 5.2 release.
Further reading
Explore the latest developments in Software for 3D modeling and additive manufacturing.
Source note: This article includes information reported by 80.
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