diff --git a/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainEditorController.java b/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainEditorController.java
index 048a816f5..c1aa98dbd 100644
--- a/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainEditorController.java
+++ b/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainEditorController.java
@@ -1285,6 +1285,19 @@ public class TerrainEditorController {
         return levelTerrainDesiredHeight;
     }
 
+    /**
+     * Smooth bumps in the terrain by averaging the height in the tool radius.
+     * The smoothAmount affects how many neighbour points are averaged, The smaller
+     * the value, then only the smaller bumps will disappear. A large value will
+     * smooth larger hills
+     * @param markerLocation
+     * @param heightToolRadius
+     * @param smoothAmount
+     */
+    protected void doSmoothTerrain(Vector3f markerLocation, float heightToolRadius, float smoothAmount) {
+
+    }
+
 
 
 
diff --git a/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainEditorTopComponent.form b/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainEditorTopComponent.form
index b7a0b5ade..4d081aef3 100644
--- a/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainEditorTopComponent.form
+++ b/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainEditorTopComponent.form
@@ -538,12 +538,18 @@
             </Component>
             <Component class="javax.swing.JToggleButton" name="levelTerrainButton">
               <Properties>
+                <Property name="buttonGroup" type="javax.swing.ButtonGroup" editor="org.netbeans.modules.form.RADComponent$ButtonGroupPropertyEditor">
+                  <ComponentRef name="terrainModButtonGroup"/>
+                </Property>
                 <Property name="icon" type="javax.swing.Icon" editor="org.netbeans.modules.form.editors2.IconEditor">
                   <Image iconType="3" name="/com/jme3/gde/terraineditor/icon_terrain-level.png"/>
                 </Property>
                 <Property name="text" type="java.lang.String" editor="org.netbeans.modules.i18n.form.FormI18nStringEditor">
                   <ResourceString bundle="com/jme3/gde/terraineditor/Bundle.properties" key="TerrainEditorTopComponent.levelTerrainButton.text" replaceFormat="org.openide.util.NbBundle.getMessage({sourceFileName}.class, &quot;{key}&quot;)"/>
                 </Property>
+                <Property name="toolTipText" type="java.lang.String" editor="org.netbeans.modules.i18n.form.FormI18nStringEditor">
+                  <ResourceString bundle="com/jme3/gde/terraineditor/Bundle.properties" key="TerrainEditorTopComponent.levelTerrainButton.toolTipText" replaceFormat="org.openide.util.NbBundle.getMessage({sourceFileName}.class, &quot;{key}&quot;)"/>
+                </Property>
                 <Property name="focusable" type="boolean" value="false"/>
                 <Property name="horizontalTextPosition" type="int" value="0"/>
                 <Property name="verticalTextPosition" type="int" value="3"/>
diff --git a/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainEditorTopComponent.java b/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainEditorTopComponent.java
index 1f0391101..c309651c1 100644
--- a/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainEditorTopComponent.java
+++ b/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainEditorTopComponent.java
@@ -481,8 +481,10 @@ public final class TerrainEditorTopComponent extends TopComponent implements Sce
         roughTerrainButton.setEnabled(false);
         jToolBar1.add(roughTerrainButton);
 
+        terrainModButtonGroup.add(levelTerrainButton);
         levelTerrainButton.setIcon(new javax.swing.ImageIcon(getClass().getResource("/com/jme3/gde/terraineditor/icon_terrain-level.png"))); // NOI18N
         org.openide.awt.Mnemonics.setLocalizedText(levelTerrainButton, org.openide.util.NbBundle.getMessage(TerrainEditorTopComponent.class, "TerrainEditorTopComponent.levelTerrainButton.text")); // NOI18N
+        levelTerrainButton.setToolTipText(org.openide.util.NbBundle.getMessage(TerrainEditorTopComponent.class, "TerrainEditorTopComponent.levelTerrainButton.toolTipText")); // NOI18N
         levelTerrainButton.setFocusable(false);
         levelTerrainButton.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
         levelTerrainButton.setVerticalTextPosition(javax.swing.SwingConstants.BOTTOM);
diff --git a/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainToolController.java b/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainToolController.java
index fc5a66228..f1e1d1bce 100644
--- a/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainToolController.java
+++ b/sdk/jme3-terrain-editor/src/com/jme3/gde/terraineditor/TerrainToolController.java
@@ -69,6 +69,7 @@ public class TerrainToolController extends SceneToolController {
     private float heightToolRadius;
     private float heightAmount;
     private float levelAmount;
+    private float smoothAmount;
     private float paintAmount;
     private int selectedTextureIndex = -1;
 
@@ -257,7 +258,7 @@ public class TerrainToolController extends SceneToolController {
             editorController.doModifyTerrainHeight(getMarkerLocation(), heightToolRadius, -heightAmount);
         }
         else if (TerrainEditButton.smoothTerrain == getCurrentEditButtonState() ) {
-
+            editorController.doSmoothTerrain(getMarkerLocation(), heightToolRadius, smoothAmount);
         }
         else if (TerrainEditButton.levelTerrain == getCurrentEditButtonState() ) {
             if (editorController.doGetLevelTerrainDesiredHeight() == null) {