Archviz - 3D Rendering and Compositing

This is an example of a 3D Rendered image composited into a real photo image.

I have made the 3D in Blender, Cycles r.e. 

The background image is not mine, i have found it on internet and i don't know who the author is, to credit him, i thank him anyway and i hope to can add his name sooner or later.

Final Image

Original Photo BG

Edited BG

Rendered Building Layer

Final Compositing