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Weld

Hairline gaps between vertices are what make a mesh non-manifold and break every boolean, remesh and watertight export downstream. This merges anything within a tolerance and closes them.

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Weld node

The Weld node

When to use it

Hairline gaps between vertices are what make a mesh non-manifold and break every boolean, remesh and watertight export downstream. This merges anything within a tolerance and closes them.

How to use it

  1. 1

    Connect the mesh with the open edges

  2. 2

    Set the merge tolerance

  3. 3

    The output is the welded mesh

Pins

Pin Type Description
Mesh Mesh The mesh with the splits you want closed.
Pin Type Description
Mesh Mesh The welded mesh. Normals come back fully smooth, so any hard edges you had will need setting again.

Settings

Setting Type Description
Weld Per Section True/False Weld inside each material section on its own, so the borders between sections stay split. Off welds straight across the whole mesh.
Merge Vertex Tolerance Number Two edges only merge when both pairs of end vertices sit closer than this. Push it too high and edges that were never meant to meet get pulled together, so a sleeve fuses to the arm it rests on.
Merge Search Tolerance Number How far apart two edge midpoints may be before the node stops treating them as a possible pair. Keep it a little above the vertex tolerance.
Only Unique Pairs True/False Only merge where exactly one candidate matches. Turn it on when three or more surfaces meet along the same line and the weld keeps grabbing the wrong partner.

Available in Mesh Morpher Graph and Mesh Morpher Studio.