Everything starts with Bing satellite imagery, right?
My question would be: Why the need for anything else on the ground except for non-stationary objects like waves, cars, boats?
Are all the buildings removed from the satellite images and replaced with draw objects. Same with trees, bushes, grass?
What about terrain? Why the need to overlay artificial terrain when the satellite imagery already exists?
It seems to me the Bing data is nothing more than a location reference, and everything else is an artificial graphical overlay. Surely this contributes to the lack of performance in more complex environments.
Please explain this in a way that someone (like me) with no 3D modeling experience can hope to understand.