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The ExtrudeSrfTapered command creates a solid by tracing the path of the surface edges in a straight line tapering in or out at a specified draft angle.


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.


Specify the draft angle for the taper.

The draft angle depends on the construction plane orientation. When the surface is vertical/perpendicular to the construction plane, the draft angle is zero. When the surface is parallel to the construction plane, the draft angle is 90 degrees.


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.


Specifies how corner continuity is handled.


The corners of the tapered surfaces will extend to meet at sharp corners with position (G0) continuity.


The corners of the tapered surfaces will be filled with filleted segments with tangent (G1) continuity.


The corners of the tapered surfaces will be filled with blend segments with curvature (G2) continuity.



Deletes the original geometry.


Retains the original geometry.


Toggles the draft angle direction.

See also

Extrude curves and surfaces

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