U2a architecture studio - http://u2aarchitecture.tumblr.com/
This was my entry in a recently concluded Rendering competition sponsored by chaosgroup, "Vray1.6 For Sketchup Beta Rendering Challenge"
Software used:
-Sketchup8
-Vray1.6 For Sketchup
-Adobe Photoshop CS5
-Nik Software Color Efex Pro 3