Weird lighting / shadows with lumen

Hi, when I turn lumen down to anything below high I get a weird harsh shadow effect, anyone know what’s going on?


I assume that when you move closer the black shadow fades away?

Looking at the documentation: Lumen Global Illumination and Reflections in Unreal Engine | Unreal Engine 5.0 Documentation

Try to modify the Lumen Scene View Distance to see if it changes anything for you!

Lumen Scene View Distance Sets the maximum view distance of the scene that Lumen maintains for ray tracing against. Larger values increase the effective range of sky shadowing and global illumination, but increase GPU cost.

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Hi, thank you for looking into it. But I literally just solved it. This is actually a mesh, and not using unreals landscape. The mesh had some weird two sided problems from the get go (I didn’t create it). So I was just messing with all the import settings I could and turned on two sided distance field generation and imported again and it is fixed. Once again thanks for looking into it though

I am happy you found the solution! :slight_smile:

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For future reference, this is DFAO. Lumen is disabled on medium (or lower) scalability and is replaced by DFAO which is very sensitive to the built mesh distance fields.

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