I've been using roofs in various different ways and this build also uses roofs to close the gap between the walls (it is a first floor dragged down) and the sloped grass. When I was looking if I had to make a tutorial/video on this thing, I actually bumped into this one:
https://youtube.com/watch?v=b4vsqm3EqPM She uses roughly the same workaround, with the difference that I use the roofs all around the complete basement, dragging them further inside my basement and rounding out the slopes, so the windows from the inside give as good a view as the windows from the outside. I explain this
here.
