diff --git a/jme3-core/src/main/java/com/jme3/shadow/AbstractShadowFilter.java b/jme3-core/src/main/java/com/jme3/shadow/AbstractShadowFilter.java
index ae2e3c120..7a2f4ecbd 100644
--- a/jme3-core/src/main/java/com/jme3/shadow/AbstractShadowFilter.java
+++ b/jme3-core/src/main/java/com/jme3/shadow/AbstractShadowFilter.java
@@ -62,6 +62,12 @@ public abstract class AbstractShadowFilter<T extends AbstractShadowRenderer> ext
     protected T shadowRenderer;
     protected ViewPort viewPort;
 
+    /**
+     * used for serialization
+     */
+    protected AbstractShadowFilter(){
+    }
+    
     /**
      * Abstract class constructor
      *
diff --git a/jme3-core/src/main/java/com/jme3/shadow/DirectionalLightShadowFilter.java b/jme3-core/src/main/java/com/jme3/shadow/DirectionalLightShadowFilter.java
index eb58a2ef8..2d745b3fe 100644
--- a/jme3-core/src/main/java/com/jme3/shadow/DirectionalLightShadowFilter.java
+++ b/jme3-core/src/main/java/com/jme3/shadow/DirectionalLightShadowFilter.java
@@ -56,6 +56,16 @@ import java.io.IOException;
  */
 public class DirectionalLightShadowFilter extends AbstractShadowFilter<DirectionalLightShadowRenderer> {
 
+    /**
+     * Used for serialzation.
+     * Use DirectionalLightShadowFilter#DirectionalLightShadowFilter
+     * (AssetManager assetManager, int shadowMapSize, int nbSplits)
+     * instead.
+     */
+    public DirectionalLightShadowFilter() {
+        super();
+    }
+    
     /**
      * Creates a DirectionalLightShadowFilter Shadow Filter More info on the
      * technique at <a
diff --git a/jme3-core/src/main/java/com/jme3/shadow/PointLightShadowFilter.java b/jme3-core/src/main/java/com/jme3/shadow/PointLightShadowFilter.java
index 53c06bf07..1e26772dd 100644
--- a/jme3-core/src/main/java/com/jme3/shadow/PointLightShadowFilter.java
+++ b/jme3-core/src/main/java/com/jme3/shadow/PointLightShadowFilter.java
@@ -56,6 +56,16 @@ import java.io.IOException;
  */
 public class PointLightShadowFilter extends AbstractShadowFilter<PointLightShadowRenderer> {
 
+    /**
+     * Used for serialization.
+     * Use PointLightShadowFilter#PointLightShadowFilter(AssetManager
+     * assetManager, int shadowMapSize)
+     * instead.
+     */
+    public PointLightShadowFilter() {
+        super();
+    }
+
     /**
      * Creates a PointLightShadowFilter
      *
diff --git a/jme3-core/src/main/java/com/jme3/shadow/PointLightShadowRenderer.java b/jme3-core/src/main/java/com/jme3/shadow/PointLightShadowRenderer.java
index 407f72367..a16c4353b 100644
--- a/jme3-core/src/main/java/com/jme3/shadow/PointLightShadowRenderer.java
+++ b/jme3-core/src/main/java/com/jme3/shadow/PointLightShadowRenderer.java
@@ -63,9 +63,10 @@ public class PointLightShadowRenderer extends AbstractShadowRenderer {
     private Geometry[] frustums = null;
 
     /**
-     * Used for serialization use
-     * PointLightShadowRenderer"PointLightShadowRenderer(AssetManager
+     * Used for serialization.
+     * Use PointLightShadowRenderer#PointLightShadowRenderer(AssetManager
      * assetManager, int shadowMapSize)
+     * instead.
      */
     public PointLightShadowRenderer() {
         super();
diff --git a/jme3-core/src/main/java/com/jme3/shadow/PssmShadowFilter.java b/jme3-core/src/main/java/com/jme3/shadow/PssmShadowFilter.java
index f2a32ba73..1d38c67c5 100644
--- a/jme3-core/src/main/java/com/jme3/shadow/PssmShadowFilter.java
+++ b/jme3-core/src/main/java/com/jme3/shadow/PssmShadowFilter.java
@@ -69,6 +69,16 @@ public class PssmShadowFilter extends Filter {
     private PssmShadowRenderer pssmRenderer;
     private ViewPort viewPort;
 
+    /**
+     * Used for serialization.
+     * Use PssmShadowFilter#PssmShadowFilter(AssetManager
+     * assetManager, int size, int nbSplits)
+     * instead.
+     */
+    public PssmShadowFilter() {
+        super();
+    }
+    
     /**
      * Creates a PSSM Shadow Filter 
      * More info on the technique at <a href="http://http.developer.nvidia.com/GPUGems3/gpugems3_ch10.html">http://http.developer.nvidia.com/GPUGems3/gpugems3_ch10.html</a>
diff --git a/jme3-core/src/main/java/com/jme3/shadow/SpotLightShadowFilter.java b/jme3-core/src/main/java/com/jme3/shadow/SpotLightShadowFilter.java
index 10130a9bc..85f235d8b 100644
--- a/jme3-core/src/main/java/com/jme3/shadow/SpotLightShadowFilter.java
+++ b/jme3-core/src/main/java/com/jme3/shadow/SpotLightShadowFilter.java
@@ -56,6 +56,16 @@ import java.io.IOException;
  */
 public class SpotLightShadowFilter extends AbstractShadowFilter<SpotLightShadowRenderer> {
 
+    /**
+     * Used for serialization.
+     * Use SpotLightShadowFilter#SpotLightShadowFilter(AssetManager assetManager,
+     * int shadowMapSize)
+     * instead.
+     */
+    public SpotLightShadowFilter() {
+        super();
+    }
+    
     /**
      * Creates a SpotLight Shadow Filter
      *