Hey all, I have found that building lighting on 4.6.1 on my level now yields a .map file that is 1.1Gb (UE4.5 was only around 400Mb) and has severely impacted the FPS.
I believe it is due to the lighting changes in 4.6.1 with how foliage is dynamically lit. To test this I removed the InstancedFoliageActor from my level and rebuilt lighting and found the .map size to come back down to 400Mb and FPS returned.
I’ve played around with the ‘Cast Dynamic/Static Shadows’ settings under the ‘Show Instance Settings’ in the Foliage paint tool with no luck.
Might anyone know what my issue could be?