Intersection line between mesh and solids - make2d

Hi all,

I am struggling with creating a 2d drawing from a 3d model containing the terrain mesh and extruded buildings.
The outcome effect I expect is to have the intersection line between the mesh and solid (trimmed to mesh?)

I have tried several options, like -
turning all the buildings to meshes and than meshintersect. However, after make2d there two lines visible- of the building and new intersection line ,which means double-work for me in autocad in order to clean up the drawing.

I hope that perhaps there exists some smart way to speed up the process, if anyone has any cool idea I’d highly appreciate hints !


Could you create a solid terrain mesh and boolean subtract the mesh from the buildings?