[GRASS5] 3D vector blocks (houses): v.extrude?

[Markus Neteler]

hi,

to easier generate houses from 2D footprints with height in
an attribute columne, it would be great to have a tool
such as 'v.extrude' which creates a 3D cube using the
2D vector map and height info.

Any volunteer out there to implement such a thing?
:-)

Markus