Reza Sarkamari covers LPEs or Light Path Expressions in Maya, Arnold, and Nuke.
Many production render engines will allow you to create LPEs or Light Path Expressions. It’s a method for conveniently outputting lights in 3D to an AOV or arbitrary output variable for compositing.
This new tutorial from Reza Sarkamari offers a novice look into creatin LPEs in Maya using Arnold and how to work with those in a compositing application like Nuke. You can use LPEs to extract specific light contributions from Arnold into different custom AOVs.
About Reza Sarkamari.
Reza Sarkamari has nearly two decades in the industry and is a Maya Certified Professional, a Nuke Certified Trainer, and an Adobe Certified Specialist.