Check you Model View Options Dialog.
Check to see if the Override Cut Fills checkbox is checked with the Show Skin Separator Lines checkbox unchecked.
That can cause such a display of composite Walls.
And please do not post a question in multiple forums.
I have merged the two topics and deleted your othere post with the exact same question.
Andro: I dont think those checkboxes have anything to do with the fact that he has a composite structure (if that is the case) but the skin separator lines are not visible.
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