The Removable Mt. Rock Roof Mod is a simple mod just to patch Core. Colonists will be able to remove overhead mountain.
How to remove Thick Roofs (Overhead Mountain)
- Use the regular “Remove roof area” option found in the Architect > Zone/Area menu to draw an orange area above the roof you want to remove.
- Wait for a pawn to remove it or select a constructor pawn and right click the area to instruct him to do it right away.
- They will remove it like any other roof.
The Removable Mt. Rock Roof Mod is a format that patches Core (Defs), there is no fear that save data will be changed to a special form because those patches are done at game startup every time. Therefore, you can safely enable/disable this Mod at any time.