QA_AA

No gaps or holes should exist unless shown in the DWGs.  These are commonly found under buildings, or at bottoms of doors.  Fill in the “ground” and/or move the geometry as needed.

If you see any unusual elements or objects on a building, check the drawings to see if it exists and if it should be visible. Sometimes hidden lines in the cad end up visible in the 3D model.

On tiled roofs, gables should have tiles.  Make sure tiles are overlapping in the correct direction, so that water will cascade down the roof, and fall to the ground.  Only the top tiles at the peak should be short, when needed.  Other tiles should all be the same length.