Chaos Group have posted a Film & VFX Showreel for their V-Ray render engine.
V-Ray Tutorial - Volumetrics
Look into the volumetric effects in V-Ray with these two videos.
V-Ray 3.3 for Maya
Here is an overview video of what's new in the V-Ray 3.3 render plug-in for Maya.
Metal Shader in V-Ray 3.0
Seth Thompson shows how to create a metal shader with V-Ray 3 in 3ds Max.