I’ve been really impressed so far. In most cases it’s clearly AI modeling from aerial / satellite imagery, and sometimes it seems like you get a generic building model and sometimes you get a pretty good representation of the actual building shape with bits of the imagery mapped onto it (for better or worse).
It’s mostly like looking at Google Earth in 3D mode, but for FS it’s still really quite immersive and you can actually navigate by reference to landmarks you know and not have to worry that the scenery is just all made up as in the past.
It’s not perfect but it’s way beyond “good enough” and anyone expecting a realistically hand-modeled version of 50 billion buildings should adjust their expectations (IMHO) lol. And the AI will likely just keep getting better over time. Yes, there are some places and plenty of unusual buildings or other structures that it doesn’t magically figure out yet.
And for worldwide coverage, I think a lot of (if not most of) that great-looking “satellite” imagery that makes this possible was actually taken from airplanes, so it’s not too surprising that we don’t have this level of detail for many countries (including some where a camera is still considered a spy’s tool).