I have migrated my map from 4.13.2 to 4.16.0. I changed .ini file(4.16.0) settings same as 4.13.2 and built lighting in preview quality.
4.13.2(Preview quality)
Build time is around 9 hr
Almost zero black spot on walls and better result
4.16.0(Preview quality)
Build time is only 1 hr 30 min
Black spots everywhere
Why both versions give different result on same lighting setup ? Is there anything i am missing to consider in version 4.16.0?