The Depth Buffer is disabled in singleplayer X-plane 11 because the program and some plugins for it use the internet. You can't cheat in a flight simulator, its meant to be tweaked and manipulated heavily. Is there a way we can re-enable it? As time goes on more and more simulator type games will rely on the internet even when in single player
mode to access real life data. For example, weather, atmospheric conditions, large textures/models from 3d satellite data, etc...
*Edit: What I'm getting at is, simulators such as X-Plane 11 and Flight Simulator 2020 already are and are in the process of inherently relying on the internet to function. So reshade depth buffer wont work for a game where cheating is not possible and a huge portion of the demographic who uses the software, use some form of visual modification.