AutoCAD Civil 3D

[#1]

Hi all,

I will be working on a unique project.  It a museum that is underground.  The entrance is at grade.  It will kind of be like entering a cave.  How do I make a surface for something like that?  We will need earthworks also.  I guess my proposed surface would be the ground floor of the building but not sure how to Civil3D the ceiling for earthworks.

Any thoughts?

[#2]

Civil 3D will not model a tunnel. You would need to create a surface for the ceiling and a separate surface for the floor. Beware of vertical or overhanging faces as Civil 3D does not support that functionality.