Hi, I've just started playing Desperados III, looking great so far. I only have one small annoyance. The characters I select get a green shade that(s quite ugly. Some of the enemies seem to have them too, seemingly automatically. It's the same green like the view cones so it might be linked, but I as wondering if there's a way to turn that green stuff off? I tried pretty much everything by playing around with the options but no dice.

"Outline Strength" under Gameplay options is what you're looking for, I think.
Unfortunately you can't turn it off completely but setting it to "Weak" should do until Mimimi maybe patches in the fourth "No Outline" choice.