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

hi thanks for the suggestion. But turns out it was forward shading that caused it. once i disabled it everything was fine