Just tested. This is Exacly it. Thanks a bunch.
Which one was it, the material or the roof walls not being connected?
Also one thing to keep in mind, I find a lot of the tiling doesn't look right unless you set it around .3 or even lower sometimes.
And even if you can't find exactly the *right* material to use to match the roof, it's pretty rare that characters in-game ever see the roof tiling the way the camera works and how the roofs fade out.
I can now atleast go to bed without having to think about it in my dreams.
Speaking from experience, this is VERY annoying