https://www.youtube.com/watch?v=kQ6n9TmCGNk&ab_channel=Cold
Just a little preview of something I'm working on for the past two months, I plan on posting more soon
With this system you can create "local physics grids" for vehicles like starships, trains, cars, or other large moving structures, so the objects inside of them are in a relative frame of reference. Effectively removing all the problems that come with vehicles where players can walk inside of then while they are moving.
I can make those grids move at very fast speeds (unlimited i suppose?) and locally you and the physics objects would not "feel" anything since they are in a relative frame.
It requires tons of changes to the engine source to make stuff like raycasts, sweeps, overlaps, character movement, and other positional systems like LOD and network relevancy based on distance to work, so it probably will not launch as a plugin.
And yes, this is for a space game, I'm cursed with the mission of creating one.