This is the 1500 building I modeled. I started by physically 3D scanning the building with a lIdar scanner and went around the perimeter of the building, after the scan I used a software called Trimble and trimded out what I didn't need like trees. Then I put the data into AutoCAD and modeled it with as much acuracy as possible. When that's done, it we transered to 3ds Max to place the materials as you see down below as well as Inventor to shrink it down and modify whats need for the 3D Print.