One of the things that really can make a difference in an image is the amount of objects and furniture placed at the scene. A good scene is filled with lots of those objects that will help with the visual composition, and give some nice shadows to create depth in the final render. In this image created by the guys of Intrinsic 3D we can take a look into a Rooftop modeled in Blender, and rendered with Octane Render. At their web site we can check out the progress f the modeling, showing an empty scene and how the placement of objects can make the difference.
And besides the modeling, we can look at some good rendering examples made with Octane Render.
Another nice piece of work. Where is this? Or is it imaginary?