LOD's

Result

My scene originally had 2 LOD's for trees and some rocks. I gave the trees 4 LOD's instead and added LOD's on other objects as well, like the cave rocks.

For the forest it didn't improve that much, but surprisingly the other scenes rooms did change a lot.

Progress

I first gave the rocks 4 LOD's like the trees, but I noticed that there wasn't much improvement compared to when I hadn't added LOD's yet. I think calculating all the LOD switching was giving more trouble than it wins, so I put the rocks back to 2 LOD's.

Same for the treasure place, where I tested if it was worth it to give them LOD's or not.