Select All by Trait

Non Manifold

Reference

Mode:

Edit Mode

Menu:

Select ‣ Select All by Trait ‣ Non Manifold

Selects the non-manifold geometry of a mesh. This entry is only available in the Vertex and Edge selection modes.

The Adjust Last Operation panel offers the following options:

Extend

Adds to the current selection instead of replacing it.

Wire

Selects edges that do not belong to any face.

Boundaries

Selects edges at boundaries and holes.

Multiple Faces

Selects edges that belong to three or more faces.

Non Contiguous

Selects edges that belong to exactly two faces with opposite normals.

Vertices

Selects vertices that are isolated, belong to an edge that’s a Wire or has Multiple Faces, or are the only vertex connecting two faces.

Loose Geometry

Reference

Mode:

Edit Mode

Menu:

Select ‣ Select All by Trait ‣ Loose Geometry

Depending on the selection mode, this operator selects vertices that are not part of any edge, edges that are not part of any face, or faces that do not share an edge with any other face.

Interior Faces

Reference

Mode:

Edit Mode

Menu:

Select ‣ Select All by Trait ‣ Interior Faces

Selects faces that may have been accidentally created inside the mesh instead of on the mesh’s surface. Specifically, it selects faces with “abnormal” neighbors (multiple neighbors connected to the same edge), as well as any “normal” neighbors of those faces.

Faces by Sides

Reference

Mode:

Edit Mode

Menu:

Select ‣ Select All by Trait ‣ Faces by Sides

Selects all faces that have a certain number of vertices. The number can be specified in the Adjust Last Operation panel.

Poles by Count

Reference

Mode:

Edit Mode

Menu:

Select ‣ Select All by Trait ‣ Poles by Count

Finds vertices that are a pole, namely vertices that are connected to an irregular number of edges. Then, selects either those poles (in vertex selection mode) or the edges/faces connected to them (in edge/face selection mode).

Before selecting poles.

After selecting poles.

Pole Count

Specifies the number of edges a vertex must (not) have to be considered a pole.

Type

Defines the comparison method for determining poles:

Less Than:

Find vertices that have fewer edges than Pole Count.

Equal To:

Find vertices that have exactly Pole Count edges.

Greater Than:

Find vertices that have more edges than Pole Count.

Not Equal To:

Find vertices that have more or fewer edges than Pole Count.

Extend

Adds to the existing selection rather than replacing it.

Exclude Non Manifold

Skips poles that are part of non-manifold geometry.

Hint

Poles can cause ugly pinching when using the Subdivision Surface Modifier, so this operator is useful for finding them.

Ungrouped Vertices

Reference

Mode:

Edit Mode

Menu:

Select ‣ Select All by Trait ‣ Ungrouped Vertices

Selects all vertices that are not part of a vertex group.