If you have spent any time navigating the depths of your FlightGear installation directory or its associated cache folders, you may have stumbled upon a peculiar file named . At first glance, it looks like a binary ghost—neither an executable nor a standard scenery file. For many users, this file becomes a source of confusion, especially when it grows to several gigabytes or appears to cause crashes.
While you cannot disable the cache (and you wouldn’t want to), you can manage its growth: fg-optional-mp-files.bin
To work with fg-optional-mp-files.bin , you may need to use the following tools and software: If you have spent any time navigating the
: This file contains the necessary assets (maps, textures, code) to play the game's multiplayer mode Is it "Optional"? : Yes, if you only plan to play the Single-Player Campaign While you cannot disable the cache (and you