>>106149065He did concept art along with Mezieres, but some elements of The Incal (one of the chapters is called Quintessence, or The Fifth Essence, for example) were apparently lifted. There was a lawsuit with Jodo and Moebius vs Besson, but they lost because Moebius was in the credits.
From what I remember, Moebius worked on Alien, Tron, The Abyss, The Fifth Element, Willow, Masters of the Universe, The Time Masters, Little Nemo: Adventures in Slumberland, and maybe some other stuff.