This building in Tallin should be probably modified:
http://demo.f4map.com/#lat=59.4373843&lon=24.7452623&zoom=19&camera.theta=68.205&camera.phi=20.087
another building with bugs:
http://demo.f4map.com/#lat=52.3717513&lon=9.7349709&zoom=19&camera.theta=37.838&camera.phi=19.194