I think a night-time version is beyond the scope of the project for now; certainly beyond April. So yes, lighting will have to be a blend of dynamic and static / cheated lighting (like baking shadows) for some areas. The FG I’d like to be dynamic with potential for cheating increasing as we go backward into MG and BG
If I can ever finish grading this week I’d like to spend some time on foliage R&D to get a better feel for what’s possible and optimal. Planes is definitely an option and likely for the furthest BG assets. But the BG tree clusters closest to the MG zone I’d like to keep 3D if possible. So maybe each BG asset has a 3D version and a 2D version?