Vray is a plugin for 3DS max which is used to create realistic lighting.Not like other lighting and rendering ,Vray has many advantages like,
>>in ordinary lighting the light from a source falls on an object and reflects ,but in vray the light which is reflected by other object and the source,is interacted by another object(which we consider)
>>It uses HDRI(High Dynamic Radiance Image) for environment lighting hence,its difficult to distinguish between a real picture and a 3d model,that's the power of VRAY
>>It had caustics
A tutorial would be followed to know its might
