Just some minor cutaway issues it could be intentional or a weird result of my many windows and weird floor plan. I'm running only Def's Long Term Survival and a towing mod and occasionally cheat menu. Looking at the screen shots I'm seeing this mostly occurring near windows, probably intentional there, and at inward facing corners and x intersections. This isn't game-breaking but it could be irritating if I wanted to put up posters or shelves and then not being able to see them if I somehow forgot where I placed them. If it matters I have keen hearing and eagle eye if the odd view angle is a cause.
First screenshot: x intersection bugged cutaway.
Second screenshot: Inward facing corner bugged cutaway.
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Third screenshot: Might be a result of the windows but an entire wall is cutaway.
Fourth screenshot: While the big room through the door at the bottom of the stairs is roofed it's not acting like an indoor space with temperature.
Fifth screenshot: Just a screenshot of the whole building from the front.