In this course, we will learn how to render AOV's or perform a multi-pass render using Arnold in Maya and composite them in Nuke. Multi-pass rendering / compositing is an essential pre-requisite for anybody who wants to start their careers in the CG industry in lighting and compositing. This course attempts to explain a few important strategies in rendering AOV's, creating custom AOV's, and compositing them in Nuke using a few different techniques. We also discuss the OpenEXR format as a tool for compositing and go beyond the scope of traditional multi-pass compositing by introducing the 3D space in Nuke for re-lighting images.