You may be having the same issue I am.



https://psteamcommunity.yuanyoumao.com/workshop/filedetails/discussion/1999447172/3059618306428458191/

if on single player.. ghost bring pillar down build foundations under mesh.. other than that.. it'll always need a supporting pillar every 2x2 in all square directions of build until you can snap foundations from the lowest pillar.. exact same method used to float ceiling in official servers.. i'm trying to disable the foundation support in game. ini and can't seem to do so myself.. i'm tired of building in single player using this method i have no need to spend the time to make the foundation support when i know its already a game mechanic and very easily done but, time consuming..