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jme3-core/src/main/java/com/jme3/shadow/DirectionalLightShadowRenderer.java

@@ -221,7 +221,7 @@ public class DirectionalLightShadowRenderer extends AbstractShadowRenderer {
     @Override
     protected void setMaterialParameters(Material material) {
         material.setColor("Splits", splits);
-        material.setVector3("LightDir", light.getDirection());
+        material.setVector3("LightDir", light == null ? new Vector3f() : light.getDirection());
         if (fadeInfo != null) {
             material.setVector2("FadeInfo", fadeInfo);
         }

jme3-core/src/main/java/com/jme3/shadow/PointLightShadowRenderer.java

@@ -174,7 +174,7 @@ public class PointLightShadowRenderer extends AbstractShadowRenderer {
 
     @Override
     protected void setMaterialParameters(Material material) {
-        material.setVector3("LightPos", light.getPosition());
+        material.setVector3("LightPos", light == null ? new Vector3f() : light.getPosition());
     }
 
     @Override