A button that uses the State Pattern, we have already made, to switch between the surface and bunker view.
What was needed as an addition was a little UI system that interacts with the 3D UI elements.
The 3D-model is selfmade (except the drawing) and has a little animations when hovering over it and one for being pressed (this was quite tricky to make it work bc of the way lerp works in this case).
Whilst switching the views the system saves the last position it was on the surface and bunker respectively and indicates the current view with a one sided light.
3D UIs are IMO quite cool / immersive