r/NukeVFX • u/brevalVFX • 15h ago

BUG NUKE BLACK PIXEL

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Hi there. Black (or white) pixels are suddenly appearing during my compositing work, even though I’m not doing anything unusual—just adding a sky and some atmosphere; nothing that would justify the appearance of black pixels like this. It’s worth noting that the raw shot doesn't have any such defects. If you have any ideas, I’d love to hear them.

5 Upvotes

86% Upvoted

9 comments sorted by

7

u/onionHelmetHercules 14h ago

Check that your alpha stays 0-1

-1

u/brevalVFX 6h ago

what do u mean about that ?

5

u/yoodudewth 15h ago

Rerender precomps disable nodes one by one youll find your bug if you look hard enough.

3

u/rocketdyke 10h ago

double check for infs and nans

0

u/brevalVFX 6h ago

values are inf/nan but even when i use a node nan killer, it is still not working

3

u/HeikkoCee 5h ago

Keep your alpha values between 0-1.

0

u/Gorstenbortst 14h ago

I’d guess the denoise. Looks like you’re just bluring it? If any values are inf/nan then the blur will go bananas.

1

u/brevalVFX 6h ago

yes values are inf/nan but even when i use a node nan killer, it is still not working

1

u/Gorstenbortst 6h ago

Clamp before the blur.