I have been using the engine for a very long time now. Right now I a battling with 1 City block -like you- I have a light importance volume. Most of my foliage is independent light mass at 8. My landscape has 1 hill and there is one point light and 3 spot lights.
It has taken over 4 hours to build lighting…
I am pretty much awestruck.
I have also made sure my lightmass settings were low and changed my static lighting level scale to 4 in hopes that would speed things up. I just decided to to put the swarm agent on standalone true but that doesn’t seem to be helping… This is crazy there really is no light in my scene… Ray tracing is off… there are no bells or wistles I have one post process in a building with a cubemap to darken it because they can’t seem to fix the interiors being lighter than it is outside…
It is truely unbelievable coming from the people who said a year or so ago that one machine running unreal engine could beat Pixar’s render farm…