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UE5 - Multiple white dots caused by lightning?

Hello gentlemans,

I’m very new to UE5, simple scene here, 1 floor tile, 1 fern & 1 directional light and everytime I move the camera around I get those little white dots all around everything, tried with other assets, same problems any ideas?

check your normal buffer and if you produce nan values in your material.

Problem came from megascan assets imported with medium quality, switching to high quality fixed the issue. Switching compression type from alpha to normal also fixed it.

Not normal, but masks, that’s the correct one.

It’s kinda embarrassing bug:
https://help.quixel.com/hc/en-us/community/posts/4403382421009-UE5-EA2-Vast-majority-of-assets-imported-with-wrong-roughness