There are many ways to set up the settings in vray to render. If you are a beginner, maybe you just want to play around and need something to get started with. Here is a pdf from the Chaos Group that shows you some basic settings for Vray’s render settings. Parts of it are a little over the top for beginners and includes a little mel, but it won’t hurt you, trust me.
http://help.chaosgroup.com/vray/help/maya/150R1/vray_for_maya_primer.pdf