I think you should reset your Lightmass setting!! So many things are changed that shouldn’t be…
…but if you want to stick with this one:
- I wouldn’t go higher than 10 on bounces (can produce weird result)
- Quality 20: don’t go higher than 10!! It will raise your building time drastically!!
- If you want more detail go lower (0.6) with your smoothness!
- Environment intensity 0 ??
- I would go with the new Volumetric Lightmaps and not with the old spares one…
- Turn off compressed lightmaps (will cause a lot of dirt!)
Do you have portal(s) / Lightmass Importance Volume in your scene?