Here is a terrain being created. This shot shows the use of the
magic wand tool for selecting areas of the same height - in this
case, -52 metres, or 4 units below sea level, as shown by the
height indicator at the bottom.
Here is a shot of the same terrain when loaded into SimCity 3000:
A volcano. You can see the volcano being created in
And this is what happens when you let M.C.Escher loose on SimCity 3000: