I've spent an entire day trying various mesh and render settings in both IC and CC but always with banding....IC7 isn't as bad but it's still there...see attached.
SS on/off or sample size doesn't eliminate it. SS off minimizes it but it's still there.
Now that IC8 is on the horizon one of my main concerns is 'Will this crap stll be there in IC8?'
RL support is useless on the matter and says it's a bug....which we all know the track record on 'bugs'.
As a side note the iRay trial is useless as it only does preview, not scene render.