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Tuesday, June 18, 2024

A First Look at Unreal Engine 5

Epic Games has released a first look at Unreal Engine 5 in the form of “Lumen in the Land of Nanite,” a real-time demo running live on PlayStation 5.

Accoridng to the company, “One of our goals in this next generation is to achieve photorealism on par with movie CG and real life, and put it within practical reach of development teams of all sizes through highly productive tools and content libraries.”

This demo previews two of the new core technologies that will debut in Unreal Engine 5:

  • Nanite virtualized micropolygon geometry frees artists to create as much geometric detail as the eye can see. Nanite virtualized geometry means that film-quality source art comprising hundreds of millions or billions of polygons can be imported directly into Unreal Engine—anything from ZBrush sculpts to photogrammetry scans to CAD data—and it just works. Nanite geometry is streamed and scaled in real time so there are no more polygon count budgets, polygon memory budgets, or draw count budgets; there is no need to bake details to normal maps or manually author LODs; and there is no loss in quality.
  • Lumen is a fully dynamic global illumination solution that immediately reacts to scene and light changes. The system renders diffuse interreflection with infinite bounces and indirect specular reflections in huge, detailed environments, at scales ranging from kilometers to millimeters. Artists and designers can create more dynamic scenes using Lumen, for example, changing the sun angle for time of day, turning on a flashlight, or blowing a hole in the ceiling, and indirect lighting will adapt accordingly. Lumen erases the need to wait for lightmap bakes to finish and to author light map UVs—a huge time savings when an artist can move a light inside the Unreal Editor and lighting looks the same as when the game is run on console.

Numerous teams and technologies have come together to enable this leap in quality. To build large scenes with Nanite geometry technology, the team made heavy use of the Quixel Megascans library, which provides film-quality objects up to hundreds of millions of polygons. To support vastly larger and more detailed scenes than previous generations, PlayStation 5 provides a dramatic increase in storage bandwidth.

The demo also showcases existing engine systems such as Chaos physics and destruction, Niagara VFX, convolution reverb, and ambisonics rendering.

Unreal Engine 4 & 5 timeline

Unreal Engine 4.25 already supports next-generation console platforms from Sony and Microsoft, and Epic is working closely with console manufacturers and dozens of game developers and publishers using Unreal Engine 4 to build next-gen games.

Unreal Engine 5 will be available in preview in early 2021, and in full release late in 2021, supporting next-generation consoles, current-generation consoles, PC, Mac, iOS, and Android.

THe company says it is designing for forward compatibility, so developers can get started with next-gen development now in UE4 and move their projects to UE5 when ready.

Epic Games says it will Fortnite, built with UE4, on next-gen consoles at launch and migrate the game to UE5 in mid-2021.

In an effort to encourage developers, the company has announced it will waive Unreal Engine royalties on the first USD$1 million in game revenue.
Developers can download and use Unreal Engine to build games for free as they always have, except now royalties are waived on the first $1 million in gross revenue. The new Unreal Engine license terms, which are retroactive to January 1, 2020, are designed to give game developers an unprecedented advantage over other engine license models.


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