Cannot paint the foundations.

Regardless of which tool I use. Whether it's the platform or the foundation. It adds a giant trim that I can't change, as well as the foundation itself being unchangable. (Change meaning 'add or replace colors/wallpapers; Yes I am using the foundation wallpapers and not that regular wallpapers)

EDIT: So maybe it was miscommunication. But on the image of the house, I clicked on the visual foundation link and it took me to an even DIFFERENT (3rd kind of "different") Foundation wallpaper tool. THIS one did actually work for me.