At least in the 4.8.2 the Fringe Saturation parameter in Post Process Volume doesn’t seem to work at all.

Hey , I tested this issue and can confirm what you are a reporting. The documentation suggests this setting should be changing how pronounced the color shifting is for the Fringe effect. I was also not able to see any visual change. I have gone ahead and entered a bug UE-19238 . Thank you for takin…