Khayyam's Tomb (Help me in Rendering plz)

[alless]

Hey dudes ,

I have modeled this Tomb 3 months ago and rendered it then but I don't like that render

So i Decided to Re-Render it !

But as I'm not so Pro in Vray I wanted to Ask You guys to help me render it in the best way as possible .

 

 

ok here is render (I haven't put all trees yet)

 

in this image I have wrote my questions and hope you help me solving them .

 

ps. I would be happy to know it's problems that i won't see

Like : Brightness , What Sky to add , Lighting , Textures and etc