Hello there @m_FirstLTest! Let’s see what we can do here.
A similar conflict between metahuman and lumen was encountered in the following thread, the solutions implemented here could help on your scenario:
The other cause could be related to a drivers/GPU issue. Resolutions for that go as follows:
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Please 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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Since you are migrating elements to another project, rendering settings from the previous build could be causing a conflict. In order to reset them, please search for
DefaultGame.inifile, 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.
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Uncheck all SM5 in the project settings (Project Settings → Platforms → Windows).
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Disable motion blur in postprocessing settings.
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Remove and reinstall any mesh packs recently added to your UE.
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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.