Lumen GI no longer compaitable on Intel GPUS

[vslash9]

Summary

Lumen GI is no longer available to me while using an arc b580 GPU. Lumen works fine and runs smoothly inside the UEFN editor but I can no longer select it inside my video settings in game. This appears to have started happening in an update that unified the ray tracing and nanite rendering paths.

I have DX12 enabled, my drivers are up to date, and testing previous GPU drivers do not fix the problem. There are multiple forum posts on other platforms that started popping up around one month ago but I didn’t see anything related to it here. Here are some links to those and what other b580 users are reporting :

https://community.intel.com/t5/Intel-Arc-Discrete-Graphics/Nanite-Lumen-quot-Not-Compatible-quot-on-Arc-B580-SL-Fortnite/m-p/1744914

https://linustechtips.com/topic/1634419-fortnite-ray-tracing-not-workingcurrently-unfixable/

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

World Building

Steps to Reproduce

Plug in an arc b580 GPU

Expected Result

Be able to select lumen GI in game and have it run smoothly like in the editor.

Observed Result

Lumen GI is no able to be selected in game.

Platform(s)

windows 11

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[vslash9]

I feel that this is relevant to be on the developer forums because it’s currently killing my ability to make pretty promotional material for my up coming map. Here is an example of editor with lumen vs in game without lumen.