The sky shows banding in Photoshop, but if I press ctrl+shift+A to go into ACR, it's gone.
I assume that no actual pixels are being changed when I enter Adobe Camera Raw, and I'm not touching any buttons/sliders... it's just previewing the image differently on my monitor. The photoshop preview shows banding, the ACR preview doesn't.
However, if I SAVE the image out of photoshop and view it, the banding is there. It's like I can preview a nice band-less sky in ACR, but there's no way to save it.
This link sounded exactly like my problem: Why am I seeing banding with Photoshop but not Lightroom? BUT... according to the post, the banding is not really there, it's just a visual artifact due to photoshop take some memory-saving shortcuts.
But, that doesn't sound right to me, because if I save the image and then open it... I still see the banding.
How can I take what I'm seeing in ACR, and save it into my final png/jpg/whatever?
PS: Not sure if it matters but the photo started out life as a 32-bit HDR .psb file, which I then edited and converted to 16-bit.