Fg-optional-mp-files.bin Review

: It contains the data necessary for multiplayer, online co-op, or certain online-only features of a game. Selective Download

Recommended, as some updates may require all optional components to install correctly. fg-optional-mp-files.bin

in FlightGear’s launcher: View → Rendering → “Download other aircraft models” → set to “Only basic models” or increase the cache timeout. : It contains the data necessary for multiplayer,

It’s important to distinguish fg-optional-mp-files.bin from other FlightGear cache files: fg-optional-mp-files.bin

Never delete or modify cache files while FlightGear is running.

If you decide you do want multiplayer, the file must be placed in the same folder as the setup.exe and the mandatory .bin files before you begin the installation.