private void DoDefault(IVoxelHandle voxel, bool isLeftClick)
        {
            var change = isLeftClick ? 1 : -1;

            foreach (var v in GetVoxelsInRange(voxel))
            {
                v.Data.Height += getHeightGaussian(xDiff(voxel, v), yDiff(voxel, v), Amplitude * change, StandardDeviation);
                CheckHeight(v);
                world.NotifyVoxelChanged(v.GetInternalVoxel());
            }
        }
 public void MarkChanged()
 {
     world.NotifyVoxelChanged(this);
 }