Mesh Union

From FreeCAD Documentation

Mesh Union

Menu location
Meshes → Boolean → Union
Default shortcut
Introduced in version
See also
Mesh Intersection, Mesh Difference


The Mesh Union command creates a new non-parametric mesh object, a Mesh Feature, that is the union (fusion) of two mesh objects.

OpenSCAD must be installed to use this command, and the path to its executable must be set in the OpenSCAD preferences.

On the left two mesh objects, on the right the mesh object that is the union of those objects


  1. Select two mesh objects that partially overlap.
  2. There are several ways to invoke the command:
    • Press the Union button.
    • Select the Meshes → Boolean → Union option from the menu.


See: Mesh Feature.