Forgive the double-post, but I just proved myself wrong:
Ignore the bleed on some of the edges as I hadn't run a trim. I did that with /wb <world> shape rectangular and then /wb <world> setcorners x1 z1 x2 z2. The border distance from the edge is configurable for preventing external chunk generation.
Ignore the bleed on some of the edges as I hadn't run a trim. I did that with /wb <world> shape rectangular and then /wb <world> setcorners x1 z1 x2 z2. The border distance from the edge is configurable for preventing external chunk generation.