Test interior hangar

Hi I was happy to play with this tool but I couldn't find the right setting.
I am working on game field and I need to render some interior but it should be less dimension as possible, and it's not so easy to find good compromise when you render little dimension.
I have attached a max9 file for Vray 1.5 SP3 wich have only vray phisicalcam and the sun and an image just to see if you have suggestion on wich preset works well.
I need very good light-dark image but without splotches and good indirect shadows I don't care if i need hour of render as long good result are archived.

TY in advance.
Fabrizio

The File