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The OffsetSrf command copies a surface or polysurface so that locations on the copied surface are the same specified distance from the original surface.


1. Select a surface or polysurface.
2. Type the offset distance, and press Enter.



Specifies a distance for the offset.



Creates a fillet at sharp corners in the original surface.


Maintains the sharp corner when the original surface has a sharp corner.


Flips the offset direction of all selected surfaces. Arrows indicate the positive offset direction.


Makes a closed solid from the input and offset surfaces by lofting a ruled surface between all of the matching edges.

Loose (Surfaces only)

The resulting surface point structure is identical to the original surface.


Sets the tolerance for the offset surface. Type 0 to use the default tolerance.


Draws the offset on both sides of the original.



Deletes the original geometry.


Retains the original geometry.


Positive values offset in the direction the arrows. Negative values offset the other way.
When a plane, torus, sphere, open cylinder, or open cone surface is offset, the resulting surface is exact. Free-form surfaces are offset to within the value of the Tolerance option.
When offsetting surfaces are joined that are part of a polysurface, there is no guarantee that the offset surfaces will also join into another polysurface. For example, offsetting the six sides of a box will not result in a larger closed box. It will return six separate surfaces with gaps between the edges.
The OffsetSrf command does not maintain the overall structure of the starting polysurface in the offsets. Each surface offsets as an individual object.

See also

Create surfaces

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