Nanite is the new and improved virtualized geometry system implemented in Unreal Engine 5. Nanite provides a internal format for imported meshes, creating “Nanite Meshes” instead of the previous “Static Meshes”. Through the use of new rendering technology Nanite is able to render pixel scale and high poly counts effortlessly. Nanite harnesses new Level of Detail (LOD) rendering methods which allow for differing detail and polycounts from every unique perspective.
Lumen harnesses a fully dynamic indirect lighting pipeline which works in unison with any environments geometries, materials and light properties to provide optimized artist workflow. The optimized workflow is achieved through the full dynamic indirect lighting pipeline providing instant lighting builds and reflection captures. Lumen removes the need for reflection cubemaps, since it fully replaces other methods and is able to render geometrically precise reflections.