[Arrei]

Spawn distance does not change with rander distance. Just as with vanilla single-player, enemy mobs will only spawn when farther than 24 blocks from a player, and will only move if within 32 blocks of a player, and will not spawn/instantly despawn beyond 128 blocks (which is farther than we can load if on a flat horizontal distance). Everything else will work as normal up to  (Render distance - 1) chunks from a player.