History enabled.

Extrusions enabled.

The ExtrudeSrf command creates a solid by tracing the path of the surface edges in a straight line.


1. Select a surface.
2. Specify a distance.


If the curve is not planar, then it will be extruded in the z-direction of the active viewport's construction plane. If the curve is planar, it will be extruded in the normal direction of the plane of the curve.
Unlike Lofts and Sweeps, the initial orientation of the profile curve or surface is maintained through the extrusion.
If the input is a non-planar polycurve or a planar polycurve where the extrusion direction is not normal to the curve plane, the result will be a polysurface rather than an extrusion object.

Command-line options


Specify a location that serves as the first point when picking two points that set the extrusion distance.


Two points establish the direction angle.

Direction steps

1. Pick a base point.
2. Pick a second point that establishes the direction angle.


The BothSides option draws the object on both sides of the start point, creating the object twice as long as you indicate.

The BothSides option demonstrated with the Line command.


If the profile curve is closed and planar, both ends of the extruded object are filled with planar surfaces and joined to make a closed polysurface.



Deletes the original geometry.


Retains the original geometry.


Extrudes the object to a boundary surface.

See also

Extrude curves and surfaces

Rhinoceros 5 © 2010-2015 Robert McNeel & Associates. 17-Sep-2015