I'm on a vanilla multiplayer server (1.21.4), using fabric with qol and performance mods
One of the other players on the server has an airship base
When I'm near it, it stretches or smth and displays what looks like a big wall
The 1st image was taken while on the base (it has a glass floor)
The 2nd image was taken using tweakerge freecam
3rd image is modlist