iPhone and Lumen

[ArnonMarcus1 (ArnonMarcus)]

Hey, is there a way to have the light probes computation of Lumen offloaded through a network and have the iPhone render with Lumen using that cache, and stream-in updates?

Also, does UE5 work with ARKit on the iPhone?

[CosmicLobster]

yes, ARKit is working with UE5.

Having only lumen computed externally and then back to the device for rendering sounds complicated and not worth the effort, because one can offload the complete rendering-process to a server and stream in the results.
It’s called Pixel Streaming, you can read about it here: Pixel Streaming in Unreal Engine | Unreal Engine 5.0 Documentation and there is a learning project in the Epic Launcher.

Cheers!

[ArnonMarcus1 (ArnonMarcus)]

Thanks for the quick response - much appreciated!

Full server-side rendering is of course an option, but may complicate things more on our application’s side, especially around bandwidth vs. responsiveness for an AR-focused app.

I’ve started a more details discussion on what I’m asking about here:

Lumen GI and Reflections feedback thread

Thanks for the quick response - much appreciated! I’ve kept a close eye on Lumen for a while and even before 's presentation I went through his Siggraph document. From my understanding Lumen takes a hybrid approach about irradiance cache where long distance traces use a more traditional fixed grid probe layout in world space and then the second one uses layout that’s adaptive to surfaces on the screen. My question was more relating to the former. The idea is that if there’s part of the computa…

[CosmicLobster]

Sounds interesting, wish you luck!