Nightingale PTR Portal
The Astrarium's outside upper levels are not properly "baked." Some walls are immaterial, allowing you to pass through to the interior of the building (image), and there are invisible walls that block movement and can be climbed (image 2, image 3).
The top level railing (and their pillars) can be passed through, as well as part of the floor of the level above that, and the remaining upper area of the structure (image 4).
In the starting room all of the wall-mounted lights are improperly aligned. Many are sideways, some are sideways and upside-down.
Similar issue of an invisible structure on top of NTTC Headquarters. The invisible structure is built like a simple straight wall, but near the top it has curvature that turns to the side before the peak.
Additionally, the scaffolding on the tower south of NTTC HQ has no substance; trying to land on it results in falling through instead.