Battle-Testing UE5 Next-Gen Systems with Fortnite | GDC 2023

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Watch the recording of Epic Games’ tech talk from GDC 2023, ‘Battle-Testing UE5 Next-Gen Systems with Fortnite’.

In this talk, you get a look at how we battle-tested Lumen, Nanite, Virtual Shadow Maps (VSM), and other Unreal Engine 5 systems while developing Fortnite Battle Royale Chapter 4, and how this collaboration with the Fortnite team improved Unreal Engine for all developers.

We dissect how UE5’s systems enhanced visual quality in Fortnite, how we adapted the features to best serve the game, and how we solved some of the specific issues that we came up against while maintaining a streamlined production pipeline.

In the second half of the talk, we look at some of the key improvements we’ve made to Lumen, Nanite, and VSM in UE5. We explore the research and development that went into making those updates, including the challenges we were looking to overcome, and how the solutions to them will benefit the look, performance (and in some cases, the budget) for your game.

#UnrealEngine5 #UE5.1 #Fortnite #GDC2023 #Lumen #Nanite #VirtualShadowMaps #VSM #FortniteBattleRoyaleChapter4 #GameDevelopment #EpicGames

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Many of the innovations talked about seem to be implementing workarounds for limitations of Nanite and Lumen. The possibility of authoring games without baking lighting or worrying about LODs is amazing - but are the losses of WPO, Tesselation, Masking etc etc etc an acceptable price to pay? What hope do Indy devs have of making Nanite and Lumen work adequately for their generalized use-cases, if many workarounds, hacks and custom workflow alterations are necessary to leverage these technologies in a stylized game? "Make everything Nanite because it performs better" seems to be the current catch-cry from Epic - but this seems akin to saying "forget everything you know" and "put all your eggs in our renderer's basket". That said, Fortnite certainly does look better than ever, and there was lots of insight and food for thought, so many thanks for the talk.

kaimaiiti

Great work but please take 2 minutes to add YouTube chapters. Helps us and you (via the algorithm) significantly.

nicholasSewing

Fantastic talk, thanks for that!

17:10, are you planning on releasing your 'Blueprint Editor Utility Widget' that ran through all of your in-game static meshes and converted them to nanite? That would be super useful for those of us with legacy projects with large complex maps!

blakehandley

Amazing information on optimizing foliage for use with nanite, shadows, subsurface scattering.

thebutterflyking

pls move all the unreal examples to a fornite island to make a kind of "learning park"

carlosrivadulla

I would absolutely love it if the Megascans trees came with a version that is optimized based on these discoveries. Currently they look great but are extremely bad for performance.

KnitterX