This is just an idea I put here because I don't have any idea how could it be done or if it could be done.
Basically the player would be able to "farm" the swampland after he combines some items (some metal rods to make a plower) and then "plant" some kind of crops, such as healing plants, fungi and eletric plants. While this may sound silly, it could have some potential to extend the "unlimited sandbox" gameplay. Here are the items that I think that could be used.
Used to plow the swampland making it fertile. Combine 3 metal rods with a torch to make it (you weild them into a plow)
These seeds are collected using a speicemen container nearby a plant, you can collect seeds from the eletric and healing plants, plus you also can collect fungi spores.
Special for Aliens:
A fully evolved alien would be able to feed her children trough a special fungi she can plant (special alien hability)
Secondary notes: The plants take 3 or so days to grow (you see them growing slowlsy) and when they are harvested they are placed on the inventory so you can carry them around for more pratcity.
Any thoughts? This wouldn't be a standalone mod, but could be added on other mods to add some spin and fun