Epic has posted a nearly 10-minute long video of a real-time tech demo that is entitled “Lumen in the Land of Nanite”
The title of the game is a reference to two new tools that are featured in Unreal Engine 5: Lumen and Nanite. Lumen refers to a fully dynamic global illumination that allows the scene to react to lighting changes in real-time. Nanite uses what’s called virtualized micropolygon geometry to create incredibly detailed landscapes from “film quality source art” that makes uses of millions or even billions of polygons.
“Nanite geometry is streamed and scaled in real time so there are no more polygon count budgets, polygon memory budgets, or draw count budgets,” Epic explains. “There is no need to bake details to normal maps or manually author LODs; and there is no loss in quality.
