# Lumen no longer working in UE5.5 DX11 SM5

**URL:** <https://forums.unrealengine.com/t/lumen-no-longer-working-in-ue5-5-dx11-sm5/2126402>\
**Category:** Rendering\
**Tags:** dx11, unreal-engine, Lumen\
**Created:** [November 16, 2024, 12:43am UTC](https://forums.unrealengine.com/t/lumen-no-longer-working-in-ue5-5-dx11-sm5/2126402 "2024-11-16T00:43:37Z")\
**Posts on this page:** 1\
**Showing post:** 9

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**Author:** ![Jinkel](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/jinkel/32/998041_2.png) [@Jinkel](https://forums.unrealengine.com/u/Jinkel)\
**Post date:** [November 17, 2024, 2:12am UTC](https://forums.unrealengine.com/t/lumen-no-longer-working-in-ue5-5-dx11-sm5/2126402/9 "2024-11-17T02:12:24Z")

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I use DX12 SM6 but have the same performance issue 👇  
[Link](https://forums.unrealengine.com/t/unreal-engine-5-5-released/2117936/29)

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