Like Dave, I don't know how you drew your wall, but you appear not to have paid close attention to the inference engine while doing so. Many of the stray lines you see can simply be erased which unifies the adjacent faces. But there are several places where points are slightly out of plane with each other, requiring surfaces to be triangulated instead of a single plane. The attached screenshot is an extreme zoom of the area just above the upper left window. You can see that things are not aligned.
[image: toQZ_ScreenShot2015-04-14at8.38.03AM.png]