Hi guys,   that's a known issue with a specific type of building autogen (polyline buildings) and can show up globally wherever those buildings are placed. With P3Dv4 L-M have changed the precision of the placement code and inadvertently made some previously valid arrangements "invalid", leading to those elongated structures.    There's an active discussion going on with L-M and several developers as it affects all landclass/autogen products, not just ours (it probably shows