This is a revamp of Ndakasha's simple set up to test HDRi outdoor lighting. It uses a single HDR with no extra lights in the scene. The HDR is provided CC-BY-NA-SA courtesy of http://www.hdrlabs.com/sibl/archive/ and is included. This version includes the nodes necessary to manipulate the HDR background (it was simpler to revamp the blendfile and upload rather than trying to explain the issue).
Made with Blender 2.78 (which is not yet an option one the upload page).
wow this is perfect I noticed an intersection of two shadows from the same mesh in my file but this one is clean and well placed thanks man.