• What did you see? base building of Fernsehturm in Berlin extrudes as tall as central tower
• What did you expect to see? Only the tower should extrude up and up
• What map location are you having problems with?
  • http://www.openstreetmap.org/relation/4065110#map=19/52.52087/13.40957

From @zerebubuth:

We should review whether we should ignore any height tagging (or add extrude: false) on any building outline which has building:parts. We already do some of this analysis server-side
to assign the root_id to all building:parts, so we could extend the logic at that point to add/remove tags from the root building.

We should also do some analysis first to see if if it's common to treat the building footprint as a "bounding volume", and in how many cases we'd end up missing bits of the building if we ignored the footprint.

I would prefer we stripped off the height info (before adding a new extrude: false property) – or just set the exported height to be 0.