Game crashes at load in (solved)

[Deantwo]

Regular transitions seem to be working ok. I still cannot load in my ringworld without a ctd and my starmap is still missing.

That is true, you also reported an issue with the graphical star map.
Here: (Bug report) Star Map Gone (mostly)
I don't think anyone else has reported that issue though, so it sounds more and more like an issue with your computer.

Ensure drivers are up to date again?
And you don't have one of those weird re-shader programs, right?