Use "dither" on backdrops & rendering output to get rid of banding - it would make iClone & Character Creator look pristine for all users always
I noticed the banding/low quality look from some of the backdrops, especially the default graphic added to a new project found in the Project window.
Using Gaussian Blur, even after 8 times wont correct banding, instead it will just spread it out. Try using Dither instead on stills and video render output to smooth out gradients.
maybe Smooth filter in the color adjust window does this but isn't available for Project window's viewport background.
I started thinking what if there are some real-time options for Dithering so iC8/CC4 always looks clean on playback.