Pietro Chiovaro writes:
Here's a quick process to create building starting from a photograph.
The key element is the knife tool which allows you to model the plane (you can us the import image as plane for the photo).
Last but not least to fill up part of the missing faces you can use the "Project from View" UV Mapping Method. Last but not least duplicating some materials you can create the different reflections of the materials in the building (glass, brick wall etc...)
This is a quick method to create buildings but due to the low quality (texture tessellation) this method is mainly used in movies and tv series to create background elements, which you don't see so close.
Software: Blender 2.93