Originally posted by Koldamir Wrynn:

Got a huge piece of land cleared and I flattened out the ground, but there are random spots that ether sink down making hole or spots that rise making hills randomly even after fixing it time after time. What's causing this?

One other point: workbenches stop creatures from spawning. If the workbench radius also stops terrain objects from respawning this might account for the variance in covered spots. Esp. when you think of the radius extending underground to stones in the dirt.