Alan Monroig compares the methods for creating indirect lighting in Autodesk Maya, specifically mental ray, providing a great look at some of the differences between Global Illumination, Final Gathering, and using Irradiance Particles.

In this tutorial you’ll learn how to use three indirect lighting systems in Maya; Global Illumination, Final Gathering and Irradiance Particles

By providing a systematic approach at how each of these indirect lighting systems perform in Maya and comparing the results with the same scene, Alan shows how you can solve problems and reduce render times while still maintaining image quality.

Check out the tutorial for Comparing Indirect Lighting Systems in Maya here.