We had a strange problem occur last night. In perhaps 20x 20 section of parceled estate land the "raise" terrain tool would always LOWER the terrain. "Revert" lowered it even more way below the water level. The other tools did nothing. However in the terrain surrounding this plot, and in the same parcel, the tools worked normally.
Has anyone heard of this before? Two of us tried it with the same results. Also the previous day, all was working fine in the same area.
We didn't intend to have a deep lake in the middle of this land, so I hope someone has the answer.