We know everyone wants as many 3D buildings as possible. Unfortunately, OpenStreetMap (our primary building source) does not yet have complete building data available in every location worldwide.
Thankfully, OpenStreetMap contributors, which provides the data PlaceMaker uses, are constantly adding more building data so you may find that when you use PlaceMaker in the future, the missing buildings have been filled in!
We are actively working to expand PlaceMaker's available data sources to include as many 3D Building sources as possible all over the world. Recently, we added the entire Bing USA Building Footprint dataset to PlaceMaker and we plan to keep adding more to help fill in other countries as well.