Surface Stitcher is amazingly simple to use. Commands and workflow considerations are briefly explained below.  Please refer to the online documentation for more information.

Join Surfaces

Join Surfaces will create a new surface. For example, if you are combining surfaces 'A' and 'B', you will get a new surface called 'A + B'. The default style for new surfaces will be used.

SmartPaste

SmartPaste enables you to combine a design surface with a copy of existing ground (EG) to produce a final surface which can be blended, and can preserve EG data within voids/interior 'hide' boundaries within the design surface. The basic workflow is (assuming your design is complete enough to merge):

1. Create a new surface FinishedGrade (or similar)
2. Paste EG into FinishedGrade to effectively create a copy of EG.
3. Run SmartPaste
4. Select FinishedGrade as the 'target' surface and your design surface as the 'paste' surface
5. Configure options and press OK.

Full documentation may be found here.

Installation is performed using a downloaded, digitally signed MSI file. There are no configuration options presented during the install process.  All files for all supported versions of Autodesk® AutoCAD® Civil 3D® are included in the installation.

Admin permissions are required for installation and licensing.

Surface Stitcher is compatible with Autodesk® AutoCAD® Civil 3D® 2013-2016, 64-bit only.

When activating Surface Stitcher, make sure you are not connected to the internet using tethering or a 'surf stick' like device, else the license may be prevented from properly binding to your computer (resulting in a 'license not found' error and an inability to use the application until resolved).