I must honestly say that some of this images look great, especially the color composition for the most of them.
I like how you work with DOF, most of them look very believable. Some have those odd elements.
Just by looking at those there is a lot to learn about 3D and photo-realism, thanks for sharing.
Do you mind sharing fiew of the shaders? Or just how you made them? Wax, walls, lamp light.
I also wonder how do you set the car's curves/lut to get that really nice effect. Did you use only corona provided stuff?