Change

[kaedorg]

Could be the opacity of the right side wall of the window to be turned from 0 to 1
Could explain that this wall seems to be missing and by this way we could see the roof through the window.

David

[choronr]

Thank you both. I initially added a reflective shader to the windows. It was an improvement. Then, added a water shader to the reflective shader - this is when the shingles showed up.

[j meyer]

Looks like that wall part is mistakenly grouped with the window panes then.
Hope you can fix that easily.

[choronr]

Rotated the Cabin. Still, the same kind of reflection. Lower windows seem OK. If I disable the water shader, all windows are a bluish/gray.

[choronr]

Issue resolved thanks to 'Yossum'. There are four windows shaders. The one titled 'Windows side' should not have the water shader/Reflective shader attached to it.

[Dune]

EDIT: Ah, I didn't read the latest posts.