@njeneb: This is quite authentic, based on excavation data. So, there was no gate at the southern side, just two where the main road (the Limes) went from fortress to fortress, and one at the river's edge. The houses were from locals attracted to the Roman fortress to do business (any kind of business ;-) But the Romans taught them to line them up.
@aymenk. The fortress was made in two parts, walls, and inside buildings (a lot of work), the houses are two kinds. I lined up a few individual instances, but two 'lines' are populations with a subvariation of 0.1, so they line up. Easier, but these houses are all the same now.
Interesting fact is that if you turn the object itself it is not reflected in the bounding box of the individual instances of the pop. They line up kind of angled. Not very handy, but workable.
@TU: The large scale waves is a slightly increased patchiness
@RArcher: You maybe right
