http://www.silveriocerveira.hpg.ig.com.br/tecnologia\_e\_internet/final1%20copy-internet2.jpg
hello guys:)
this is my first post here. as it is the first job made 100% in vray, i know that it need to be improved, but would like what you think about. It take ten hours rendering… i think its too much time. maybe because i used lot of displacement maps… dont know… well, take a look and talk about it
INHO…
The red car looks good but loose the others. Your obstructing those nice looking stones as the driveway. Try adding some gloosy reflections to those stones too 
The people look a little strange in the corner and so dark.
Work on the water and that brown rock allot.
The grass could probably be a deeper green.
just my 2cents 
I think 10hrs is long also. Post some settings and maybe we can help
--Jon