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How do I create a stone stair in terrain?
To create a stone stair you simply need to slope the terrain and then add stepping stones.
The closer the regions are the steeper the slope. If your slope is too steep simply move the elevation regions further apart. For this example the regions are about 5' apart. Elevation Regions should never overlap.
To overlap the stones hold down the Ctrl or Command key while you are moving it to disable the bumping/pushing snap.