so in a post a while back i was explaining "zones" in Valheim. 64x64 areas that affect loading and blah blah a bunch of other stuff.
after doing some testing (and being annoyed that my instances didnt drop as much as i thought they would) in 3 different pre-update worlds in probably about 20 areas, I have concluded the following:
#optterrain console command does not work on all terrain.
there is a 4 meter wide area on every seam that does not get converted to the new system. a 4 meter wide area that is unoptimized old terraforming that you cannot fix without resetting it with a mod and manually changing the terrain to how it was before.
i tested this by doing the following:
