Hi husi_fps
About 2 years old but now i can certainly help with that,
So the lighting build time in a scene depend over how it is made and the settings apply to it.
- The first thing you want to do is to place a lightmass importance volume that cover all the playable area space which will give to the engine the info that this area is more important than the other.
- You want to look what is your “world settings” the “lightmass settings” this is where everything is computed, depending on the scene that you work on those settings vary,
- Build on preview mode or medium, it will give you a pretty good result and better build times.
- Just build in production when your scene is completed and polish.
- Also you want to look the lightmap density scene which can be found in the view mode → optimization viewmodes → lightmap density
You want to try to have a scene that have a pretty green coloring but again it depend based of the playable area where you want a good resolution of your lightmap vs a static meshes like a rock that you just scale big that you don’t want a too large resolution because it will affect your light build times in a strong way!
Post some screenshot of your setup if you want more help, lighting and the build times has many things that make it vary.
If you need help let me know!