In the context of a volumetric atmosphere simulation, the solution is having precise control over each individual cell of the atmosphere so you can create a low visibility scenario in the area you’re doing your training. It’s a very important distinction and completely different than “give us a visibility slider with a ring of visibility that follows your plane”. I doubt Asobo will ever respond to that because it’s nonsensical in the context of the current volumetric fog\atmosphere system that they worked very hard on. They probably just shake their head every time they see it. However, if instead people kept asking for precise control over the weather grid, maybe in the form of a map (like the manual cache) or via modifying METAR reports, they may actually listen and these training scenarios could be set up. There’s no need to go back to the stone age of distance fog, which would look ridiculous next to all the advanced rendering techniques the sim uses.