[matthewbauer]

Very cool! It looks like it assumes everything is flat, but I bet you could pull in elevation data from OSM as well.

[ygra]

It does use elevation data, but does not exaggerate it, I guess. Back when I was working with 3D maps, we noticed that many people liked exaggerated terrain heights better, especially when the terrain is viewed from above and realistic heights looked “flat”. Near where I live it looks fairly close to what it does in real life: https://streets.gl/#48.50063,8.99766,7.25,312.50,135.56 (granted, having added building and roof colors for almost all buildings also helps).

[fitsumbelay]

the 4 story building I live in is rendered like a basement only dwelling which is actually growing on me the more I look at it ...

[zaik]

You could add a building:levels value to the object in OpenStreetMap, to record the information of how many stories your building has.

https://wiki.openstreetmap.org/wiki/Key:building:levels