Light flickering

Development Rendering
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1

Hello, after the 5.5.1 update while setting light in my project the light keep flickering any idea how may i fix this

2

Hello there @dabillz!

Considering that you have just moved to 5.5, please make sure both Unreal and Windows have their latest updates.

  • As well, update your nVIDIA drivers, make sure you are picking the “Clean Installation” option, as well as going for the “Developer” drivers, as these have more stable settings for engine work.

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  • If your current project was on a previous version of Unreal, and its now updated to 5.5, rendering settings from the previous build could be causing a conflict. In order to reset them, please search for DefaultGame.ini file, open it wirh a notepad, and delete all settings under the header [/Script/Engine.RendererSettings]

  • To rule out hardware issues, in Unreal Engine, adjust your values for engine scalabillty, to ensure your equipment is not being exerted.

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  • Test disabling Hardware Raytracing from the engine

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  • Please make sure that no RTSS or overlocking are enabled for your video card while working on the engine.

  • Additionally, there are two settings to test in nVidia control panel: Go to Settings, and under Features → Overlay, disable the “Game filters and Photo Mode” option. After that, click on “Manage 3D Settings” in the settings menu on the left, go to Monitor Technology and select “Fixed Rate”. With these changes applied, please restart UE5.

3

Thank you very much ! this was helpful

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