design tunnel mesh

A 3D tunnel mesh surface used as a visual aid in viewing the shape of a tunnel design in the 3D View, where you can view the tunnel from various perspectives. The 3D mesh also allows you to use the Walk-Through Viewand 3D Drive View to further explore the interior and exterior of the tunnel and capture a "slice" of the tunnel in the Cutting Plan View. In addition, designed tunnel meshes can be exported to DWG files.

For instructions, see Create a Designed Tunnel Mesh.