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Geometry Fix




The Smooth command averages the positions of object points or vertices. This command is useful for removing unwanted detail, and for removing loops in objects.

When mesh vertices are selected, you may have to use the WeldVertices command before smoothing in order to prevent the mesh from pulling apart.


  • Curves, surfaces and meshes

  • Control points, edit points and mesh vertices


To smooth part of a curve or surface

  1. Make a supported object type points on.

  2. Start the Smooth command.

  3. Click the check boxes for the coordinate directions and adjust the Smooth factor.
    The selected object points will move slightly to smooth the object.

To set one check box and clear the others

Smooth Options

Smooth X / Y / Z

Smooths only in the specified x, y, or z direction.


Fix Boundaries

Prevents naked edges or endpoints from being moved.

Meshes: Vertices along naked edges will not be modified.

Curves: End control points will not be modified.

Surfaces: The control points along the boundaries of the surface will not be modified. The edges and trims of trimmed surfaces will be modified if they do not coincide with the surface boundary.


World / CPlane / Object coordinates

Use world or construction plane or object u, v, and n coordinates to determine the direction of the smoothing.

Smooth factor per step

Sets an amount of smoothing.

0 to 1

Object points move toward the average.

Greater than 1

Object points move past the average.


Object point move away from the average (roughing).

Number of smooth steps

Specifies the number of steps to iterate the smoothing factor through.


See also

Edit curves

Edit surfaces




Rhinoceros 6 © 2010-2020 Robert McNeel & Associates. 11-Nov-2020