there are several places in PS where your character is looking from one defined area(the one he is in) to another defined area. I am fairly sure that the Kada-El Tavern in Hydlaa and the Laanx Temple are their own seperate maps from Hydlaa plaza. If I am standing outside of the Tavern, Or I am in a tunnel at the edge of a map boundry I can see across into the next map. But if I am standing in front of the open door to the Laanx Temple or to Levrus's magic shop I can't. It fails to draw in that section of the screen. I can get the same failure to draw problem in the BD fortress, because there are things on the map that are beyond the range of the settings I have for the camera in the camera->Details section. But the one in the BD fortress as I am looking out is expected and is a result of keeping total calculations do to maintain frame rate.
I used to be able to see into these buildings from the outside in version 0.4.03.