I just got 1.5R2 with the temporary software license this morning and did a quick rendering of a previous project. No new lighting or material added yet.
looks nice ! did vray 1.5 render it faster ? 
It looks a little under exposed. It also looks like a toy house because of the plants and the roof. Your link doesn’t work by the way.
Here’s an update with a dirtmap comped in with Photoshop ‘multiply’ at 60% opacity. Sorry, I don’t recall the render time for comparison, but the time was less than 20min. for this 800x600 image with a medium IR preset setting.
are those plants 3D? the shadows look a little odd :shock: 