Create a Surface Offset from Another Surface

Use the Offset Surface command to create new surface based on an offset from another surface. This command does not rebuild the surface triangles; it simply makes a copy of an existing surface and shifts it up or down on the Z-axis. You can also leave the delta elevation at 0.00 to make a copy of the surface in place. This can be helpful if you want to keep a historical record of a surface's topography as it changes over time.

Prerequisites:

License; See the Subscription Plans page. For a license matrix by command, see the License page in the TBC Community. Also see View and manage licensed features.
Note: As a macro command, this will not be available/visible on the ribbon until it detects a valid license level. Once you have the software or hardware license installed, select Support > Set Ribbon Tabs > Reset to Defaults to refresh the ribbon.
Surface to offset from

To access the command:

Select Offset Surface in Surfaces > Create.

To create a surface by offsetting an existing surface:

In the Reference Surface list, select an existing surface as the source surface.
Enter a name for the new surface. This is the name that will appear in the View Filter Manager and other places.
Specify the vertical distance to offset the new surface from the existing surface. Positive values offset upwards.
To create the offset surface from just a portion of the reference surface, pick an existing closed polyline in the view from the Clipping boundary box.
Click OK.

Dependencies:

None; changes to the reference surface have no effect on offset surfaces.