Found place where addData was used for adding whole vertical array. We have addVerticalData for that.

src/main/java/com/seibel/lod/objects/LodDimension.java

@@ -437,6 +437,7 @@ public class LodDimension
 	}
 	
 	/**
+	 * Use addVerticalData when possible.
 	 * Add the given LOD to this dimension at the coordinate
 	 * stored in the LOD. If an LOD already exists at the given
 	 * coordinate it will be overwritten.

src/main/java/com/seibel/lod/objects/VerticalLevelContainer.java

@@ -174,13 +174,7 @@ public class VerticalLevelContainer implements LevelContainer
 		}
 		data = DataPointUtil.mergeMultiData(dataToMerge, lowerMaxVertical, getMaxVerticalData());
 		
-		for (int verticalIndex = 0; (verticalIndex < data.length) && (verticalIndex < maxVerticalData); verticalIndex++)
-		{
-			addData(data[verticalIndex],
-					posX,
-					posZ,
-					verticalIndex);
-		}
+		addVerticalData(data, posX, posZ);
 	}
 	
 	@Override