In the exterior cell Varashimmus 6,-35 in the Andaram release there is an exterior static piece - ex_dae_ruin_04 - with ugly exposed faces at eye-level. CS and in-game OpenMW screenshots provided. It's hard to get an angle on it in the CS, but you can see it in the in-game screenshot at the center-right. This appears to be a problem with a Bethesda asset: the edge of the weird half-pipe is a pixel wide when viewed from the side, suggesting it wasn't meant to be visible to players or sunk in with rubble. There's also a gap between where the weird dome face ends and the ground.