Seems like a good piece here Target. The scene,as frubes mentioned will be a lot better if you get ur hands on the lighting and shading part. I believe this is a real time screenshot from Max's viewport,which seems interesting. It is obvious from the reference that the scene has to purely benefited from specularity and reflections all over. This leaves with carefull texturing and shading work. For instance the floor,needs to have the falloff reflections which is so vital to a marble material.
A HDR lighting solution will largely add a great mood to this scene as this scene relies more on a strong exterior day light which is lightign up the entire mall.
Then comes the interor decorative lights with emmisive nature.
you can quickly try a mockup in photshop for the lighting compositions and exposure. If you are doing this for any realtime game engines like Unreal,you will benefit more with the tools available there.
Man! why do you have cars in there ?
Keep it coming