In this project, I had to make a 3D model of a supermarket stand and integrate it into a real picture for the catalogue of Grupo GP. The ending of this technique is to simulate a real life use of the object (in this case the stand). The process consisted on: Taking the real picture, Modelling and texturing the object with real photometric light using the environment of the picture as the light itself, and finally integrate it with photoshop with a few manipulation to adapt the perspective properly 

Like this one I made some more, you can ask for more examples by contacting me on the contact section.