*giannis
I have a 2D vector map which is actually a single line (it shows a coastline). I try to give to this fixed height and make it a 3D map (the line to become a wall).
I try v.extrude --overwrite input=COASTLINE@final output=coast_3d@final height=10 type=line but nothing changing at all (then I export this in .vtk and i check it out in 3D software).
Try also module <v.to.3d>:
v.to.3d input=COASTLINE output=coast_3d height=10 type=line