UE5 how to disable lumen for an existing level - force no precomputed lighting greyed out

Development Rendering
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I wanted to test out UE5 lighting with and without lumen, I’ve made a test project using the third person template, which comes with ThirdPersonMap and lumen enabled by default. In order to re-enable static lighting I’ve followed the steps to disable lumen in the project settings (lumen settings documented here Lumen Global Illumination and Reflections in Unreal Engine | Unreal Engine Documentation). But I can’t disable “Force no precomputed lighting” in the world settings, because it is greyed out

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Anyone know how to fix this? It might be something to do with ThirdPersonMap by default being a “world partition” level, because if I start a new level with this dialogue

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then “open world” → that option is greyed out, but “basic” → option is not greyed out. Which suggests open world levels don’t support static lighting? Can’t find anything in the docs about this. Is there a way to convert an existing level back to normal so you can enable static lighting again?

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Hi @VictorLerp, Can we have some intel about baked lighting in OpenWorld Levels?
I read the documentation about Levels without finding information about specifics usecases.

I’m interested about using OpenWorld levels even for small maps on VR device because if I understand well, it’s implement the OneFilePerActor functionality that reducing merge conflicts when multiple teams members working on a same level. Am I right?

Thanks

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I had this issue and I was able to fix it by just creating a new map and copying all of my items over into it.

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This feature is not yet supported, but the team is actively working on it! Keep an eye on main.

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If that helps, you can use OFPA without World Partition. It’s been available since 4.26.

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I have similar issue, I want to use data layers with static lighting, force no precomputed lighting being greyed out doesn’t allow it. I don’t want to use lumen, is there any way to force it to work?

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Any update on feature support?

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The work is currently on hold with no ETA

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For complex indoor lighting scenes with many lights, is there a workaround with a lumen enabled project to selectively prioritized baked lighting instead?

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we have the same problem. world partition do not support baking static light, we have a lot of dynamic point lights indoor, so FPS is not good. we need to bake to.

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Any new news about it? will 5.3 have this feature?

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Epic should understand that this is a very important feature, not only for Mobile and current gen hardware, but also for nextgen for certain types of games.

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