Banding artifacts caused by post processing?

[3dRaven]

[TUTORIAL] Blue noise dithering PostProcess Material to fix banding in low-contrast gradients

Color banding in gradients is one of those 1990s low bit-depth graphics artifacts we just can’t seem to escape… But after watching this amazing talk by the wizards at PlayDead on how they used blue noise dithering coupled with temporal antialiasing to all but eliminate banding in Inside: [Low Complexity, High Fidelity: The Rendering of INSIDE] I’ve been convinced there must be an easy way to accomplish this in Unreal, ideally with little to no technical hacking. Now thanks to this…

Perhaps this might of some help in reducing the color banding.

Also maybe your gradients are just too dark?

Why dark video is a terrible mess

You could use the dither aa node to break up your gradient like this

Comparison:

No Dither node

Dither node

Just like in the video dithering can help break up the banding.