[bitL]

Balconies are simply about what the threshold for shape simplification is. It's just way too much data to represent a whole city and download it over Internet so somebody decided that buildings should look pixel-perfect from half a mile away, but getting closer one could see funny edges etc. so common for edge-collapsing 3D shape simplifications.

[rasz]

The problem is its not edge collapsing, its somewhere half in the middle producing triangle shaped protrusions with bad perspective texture on top. In this particular use case photogrammetry algorithm should have some hardcoded common sense to detect boxy building and try to maintain flat surfaces and straight lines. Instead it looks like Google picked one of the open source SLAM implementations and deployed it at scale without fine tuning :(

Look at 41 central park west train wreck. You have >20 good photos to work with, but the end result doesnt even maintain straight windows. Balconies look like Lara Croft breast from first Tomb Raider, not to mention they are all different geometry despite high quality source material showing them being all the same shape. The best data saving option would probably be no additional geometry at all, just a texture.