Using Chaos Physics for Large-Scale and High-Fidelity Scenes | Unreal Fest 2024

The Chaos Physics system—and destruction in particular—has seen many changes in 5.4.

Advancements developed for Fortnite, UEFN MetaHumans with cloth, and more now enable more realistic, performant, and engaging experiences for players.

This talk explores some of our new features and improvements coming to physics in Unreal Engine, including how we achieved dynamic destruction in a huge sandbox environment; building a pipeline for creating high-fidelity clothing for your characters; and putting together a new debugging framework for physics scenes and improved runtime performance and memory usage to allow for more dynamic and expressive simulation at larger scales.

[galaxygur]

00:04:41 - Server-authoritative destruction keeps gameplay smooth and efficient by managing object connectivity and simplifying complex simulations.

00:08:23 - Optimizing game performance by pooling and rendering shared geometry instances speeds up large scenes and destruction events.

00:12:21 - Refine your boat's buoyancy and drag with our new plugin for smooth sailing in any physics scene.

00:16:16 - Smooth network physics and high-quality garment simulations are now easier with predictive interpolation and new clothing pipelines in Unreal Engine.

00:20:03 - Transform static meshes into dynamic, realistic clothing in Unreal Engine with seamless data flow and Marvelous Designer integration.

00:23:49 - Create stunning, hyper-realistic garments for Unreal Engine projects with Marvelous Designer and Data Flow—effortless import, configure, and simulate!

00:27:34 - Creating hyper-realistic clothing simulations is now easier than ever with our new tools and visual debugger.

00:31:23 - Visualizing game physics in real-time helps you debug and enhance gameplay dynamics efficiently.

00:35:00 - Dive deep into game collision data with CVD to diagnose and solve issues like a pro.

00:38:48 - Optimize your project by understanding the Chaos Visual Debugger and leveraging data-oriented design for better performance.

00:42:38 - Streamline your physics simulations by eliminating unnecessary data and optimizing particle tracking for better performance.

00:46:32 - Optimize your game physics by rate-limiting destruction events to balance performance and realism.

[hellomistershifty]

It was kind of hard to tell how much of this was internal engine improvements or what things needed to be enabled/configured

[JohnDaniels]

I've been on 4.27 plus for a long time, exactly because of the physics. Hopefully the physics are getting better I'm just now converting my project to 5.4 and we'll see how the physics work. I have to move to 5.4 in order for Xbox and PS4/5 support

[yonghengshouhu]

UE5.4.4 Motion Design - Material Designer The problem of multi-layer effect overlay that cannot be saved has not been resolved. . .

[robinj]

I think that the basics of physics needs to be improved. The Chaos physics can't handle high mass ratio constraints at all. Objects simply drift apart, it's unusable