I was learning about lighting in vray for maya and I wanted to learn more about setting up a proper HDR lighting scenario. I came across this tutorial. It is one of a few ways to set up HDR lighting in your scene. This one deals with using the Environment setting under the Render Settings. Very easy to use, but one thing is it lacks the user control independence. Meaning you have less control over the….well, everything basically. Maybe I will find a later tutorial on using the dome light for HDR, but it’s very easy to set up.
http://cg.tutsplus.com/tutorials/autodesk-maya/maya_vray_tutorial_rendering_hdri_gi/