Moirage dans les dégradés sur after effect.

[Mnarrat]

Bonjour,

Je suis actuellement en train de réaliser un court métrage avec du compositing sur aftereffect. Malheureusuement j'ai des lignes qui apparaissent dasn mes dégradés quand j'exporte. Je ne les vois pas dans after. J'ai essayé de mettre le chutier en 16bpc au lieu de 8bpc cela a partiellement réduit le problème mais ces lignes restent visibles voire très visibles notamment dans les dégradés de couleures sombres (exemple sur le petit monstre).

[Mylenium]

That's perfectly normal and not a bug or whatever. There is simply not enough color range in your imagery and inevitably there will be banding because there are no more inbetween colors. You have to live with it, even more so since there is no poinbt in trying to evade the issue by using higher bit depths. Doesn't do you any good, latest when it's distributed and encoded to compressed formats with reduced color dynamics like MP4. You have to proactively take measures to combat these issues like changing colors, adding noise/ dithering to the solid gradients and so on. Still, even then there will be some banding and block artifacts upon compression. It's just computer math and how video works.

Mylenium

[Mnarrat]

Thnak you for your answer, i ll try to minimize as much as possible the line in my gradient. I heard you talk ing about noise, could you explain more about this technic ?

Marie