// Calculate the NetDifference around a cell
private float netDiff(int x, int z)
{
float diff = 0f;
float[,] array = elevation.worldArray;
float[] cellsAround = Support.CellsAllAround(x, z, WorldX, WorldZ, array);
foreach (float element in cellsAround)
{
diff += Mathf.Abs(array[x, z] - element);
}
return(diff / cellsAround.Length);
}