Dive into an in-depth presentation on Lumen, Unreal Engine 5's Global Illumination and Reflections system. Learn about Lumen's goals, features, and settings, and gain a comprehensive understanding of how it works, including its hybrid tracing pipeline, mesh distance fields, and surface cache. Explore optimization techniques, software tracing limitations, and hardware ray tracing capabilities. Discover the intricacies of final gather, reflections, and best practices for using Lumen effectively. Get insights into platform support, performance considerations, and future developments. Witness Lumen in action through content examples and participate in an extensive Q&A session to address specific queries about this powerful lighting technology.