Lumen Global Illumination artifact issue

Development Rendering
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Hello, as you can see, when my camera turn around a object or characters, some artifacts appear (watch behind the object). When i disable Lumen global illumination this artefact disapear (or i can’t see anymore the bug)
I would add that when the camera does not move everything is fine, it is only when there is movement that the problem appears. So is this a gi refresh issue?
you can see that with the attachement.

Some users have post a topic about that but no one have a solution to fix that. Apparently, the problem has existed for a while…

What is the EXACT solution to fix the problem?
Thanks all !

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Greetings @solverVFX !

Just so you’re aware, this topic has been moved from the International forum category to the Development - Rendering forum category.

Remember, when posting, please review the categories to ensure your topic is posted in the most relevant space.

Wishing you the best of luck with your project endeavors,

Your Friendly Neighborhood Moderator :smiley:

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up

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8 billion in this world but no one guy know what is the solution about this subject … so sad :cry:

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Exactly…

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Lumen, and many other parts of modern game engines (like anti-aliasing and upscaling) rely on temporal sampling. This results in ghosting artifacts like you see here. You can decrease temporal sampling, but quality will be worse. You can increase spacial sampling to compensate, but performance will be worse.