Black smudges on render video



hi. i have these black spots appearing all over my video. im guessing its some setting. . seems to be concentrated on white materials with the odd grey here and there.. what could it be?
ps this is rendered on a 3070 and a 4070 and appears on both but the spot would be different shape or location..

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Hello there @Arno_MDS!

Checking through the community, this is a recurring scenario, with multiple causes. Let’s cover a few possible resolutions:

  • As a first step, to rule out pre-existing elements on your system, please update your OS to the latest version, and update your video drivers to the Developer version (pick the “Clean Install” option if available)
  • If you re using Virtual Shadow Maps, disable them, and test with traditional shadows or ray traced shadows instead (do the opposite if your setup’s the other way around)
  • Force fixed LOD in the affected assets/areas, preventing LOD transitions during render
  • If you are using Nanite, test disabling it, as it may cause strange shadow effects on render