For anyone who hasn't seen it, "Banding in games" by one of the Playdead (Limbo, Inside) programmers: https://www.loopit.dk/banding_in_games.pdf

Crysis had sky banding... Skyrim has the famous menu smoke mentioned in the PDF. All fixable, probably fixable on the hardware of the day. (I remember messing with dithering on a 2007 DX9 GPU)