Lighting an Exterior with HDRI using vray
James Cutler posted a very nice tutorial of HDRI Lighting for an Architecture Exterior scene using Vray as a renderer. James has explained in great detail the technique to produce accurate HDRI lighting along with proper use vray sun. The tutorial is really cool and I suggest every new user of vray to go through.
Read More : http://www.mintviz.com/tutorials/hdri-exterior-lighting-with-vray/