This February I did some work on this, I've made a "dev diary" showcasing my progress, and demonstrating some plans:
https://www.youtube.com/watch?v=0wD5r37qnwQ
For clarity: the outdoor maps in the end are more because I couldn't find any indoor tile sets that looked nice.
I imagine we could have maps of internal ships and internal of stations, and these would follow the contour of the 3D model.
Anyway, I got a lot further than I had though in shorter time than expected, once I finaly sat down and started working on this. I've learned a lot, both in getting back into C++, and also general SDL stuff.