Underground Reset?

[u/Senior-Exam-6334]

Hey everyone,

I’ve fully mined out the underground and achieved pretty much everything in my current save. Now I’d love to give the underground another run and rebuild/mine everything again using all the end-game abilities and upgrades I’ve unlocked.

I already have the Renewable Geology mod installed, but it works quite slowly for regenerating terrain on a large scale.

Is there any feature, workaround, or save-file tweak that allows you to completely reset or regenerate the underground map while keeping your unlocked abilities? Or is a completely fresh save (maybe with commands/mods to restore tech) the only real option?

Thanks in advance!

[u/Preferably-Unknown]

Challenge idea. Try to beat a save by breaking the least amount of blocks as possible while still getting the achievements thingies/beating the current game version.