Wow Jetman, really have a lot of respect for this!! It looks stunning. Two questions from a starting developer
1. Which modeling program do you use?
2. How do you get all the 'textures' you need for buildings? Since there's no program like Google Building Maker anymore, it seems really hard to get matching real life textures.
I use 3dsMax and all textures are basically handmade. I set them up in layers and add the details one after the other. It is more work than just taking photos but you can make sure there are no distorsions and everything turns out just as you want it to be...