One of the professionals tips to achieve the flawless 3D architectural exterior rendering is through making reflections. For reflections and shadows are necessary to create natural environment. For the use of any opaque object shadow is necessary and for any glass structure involved in the project reflection is must. To make the whole ambience more meaningful you may add the panoramic backgrounds. And if there are no reflections on the glass taking help from more images behind the cam is highly successful. What are the other ways to improve exterior ambience?