Hospital Entry

My vray sun is set to .9
vray sky - default
shadow subdivisions: 30
diffuse sub (sun) 1200
irr - 50
int samples - 25
f16/125/100
saturation - 1
contrast - 1.3
contrast base - .5

I’m just not getting realistic lighting with these settings. Must be my materials. Does anything seem off from the settings shown?

Image is abit dark and muddy. Needs to be bright with a bit more contrast i think.
Up the sun back to 1.0 i reckon and let more light in thru the camera.. perhaps drop the shutter speed to 100.

I dont think the BG is helping either.. seems to dark and gloomy.

Its just a few minor lighting changes and should look alot better.