Query re: jpeg export and visible banding

[Bertrude]

Hi. I'm trying to export a jpeg image from AR but keep noticing banding that's occuring in some areas - a sky area in my case. I've got the jpeg quality set to 100% in the advanced preferences but still have this happen (please see attachment). Is it to be expected due whatever compression is still taking place?

I can work around it - tiff files output better but wanted to mention it in case there's a problem with the jpeg export.



EDIT:
I've also managed to work around it by duplicating my sky background and applying 8% monochromatic noise. It's still a little apparent but not so obvious.