Introduction
The above image has been color corrected and blurred in photoshop to create the depth of field effect. This tutorial will be focusing on the dirtmap material which is included in vray version 1.5. I always like to use this material in my renders to add a little more realism. You need a basic knowledge of 3ds Max and vray to complete the tutorial.
Setting up the shader
Load the scene file and create a new Vray matarial
Assign the material to the building walls (i have grouped the walls of the front building so the windows are seperate)