Working With Lighting Features In V Ray
One of the most important parts of 3D rendering is lighting. The good news is that V Ray for Maya is getting better at lighting through an adaptive dome light and global illumination. Many of the newer features will save you time and produce better results.
Global Illumination
The Global Illumination Render Element is a image used to store indirect lighting information that comes from reflected diffuse light found in a scene when you enable indirect illumination.