An excellent article, cheers! For those scrolling through, the article is written by a developer of Valorant, a recently-released FPS. He talks about his efforts to implement a system to prevent wallhacks and the challenges he encountered while doing so.

>Cheaters use wallhacks to see opponents through walls. In a tactical shooter like VALORANT, this gives them huge advantages when it comes to individual combat encounters as well as strategic decisions for the round as a whole. Wallhacks are especially insidious because they give an advantage that isn’t always obvious - your enemies could be using wallhacks... or maybe they’ve just figured out that you rush B every round. We really wanted to prevent that sense of doubt which lingers with players, poisoning their experiences long after the match.

>At the beginning of development, when we were talking about security goals for the project, the two things that came up over and over again were wallhacks and aimbots.

>League’s Fog of War system works because the game server withholds information about the positions of enemies until a client needs to display it. I knew if I could implement something like this for VALORANT we could solve the problem of wallhacks because there would be nothing for the wallhack to see. If an opponent was behind a wall, we wouldn’t send their location to enemy players, keeping them hidden until they decided to peek the angle. If we could pull it off, this seemed like the ideal solution - but we had no idea whether this would be feasible in Unreal Engine.