I use X3Dloader to import x3d scene to construct Java3D scene graph from x3dv file~
And this x3d scene has Background node, which to pasted full image around the 3D world.
But I can't see any background in Java3D world, when I use X3DLoader to import that X3D scene.
And then I use the browser(in Java3D render) bundled with Xj3D API, to view the X3D file....I can see the background.

I think the X3DLoader is already load the background node into java3D scene, but the background node's shape is black(shade color), and no image pasted on these shape.
So how to use X3DLoader to load X3D scene's background correctly??Does everyone familiar with Xj3D API can help me.
thanks~

My JDK is 1.5, My Java3D API is 1.3.1, Xj3D API is M10

x3dv code:
---------------------------------------------------------
Background {
backUrl [ "ocean_3_back.jpg" ]
bottomUrl [ "ocean_3_bottom.jpg" ]
frontUrl [ "ocean_3_front.jpg" ]
groundAngle [ 0.1, 1.309, 1.571 ]
groundColor [ 0 0 0, 0 0.1 0.3, 0 0.2 0.5, 0 0.3 0.8 ]
leftUrl [ "ocean_3_left.jpg" ]
rightUrl [ "ocean_3_right.jpg" ]
skyAngle [ 0.1, 0.15, 1.309, 1.571 ]
skyColor [ 0.4 0.4 0.1, 0.4 0.4 0.1, 0 0.1 0.3, 0 0.2 0.6, 0.8 0.8 0.8 ]
topUrl [ "ocean_3_top.jpg" ]
}
--------------------------------------------------------

Java code
--------------------------------------------------------
BranchGroup worldRoot = new BranchGroup();
int flag = X3DLoader.LOAD_ALL;
X3DLoader loader = new X3DLoader(flag);
Scene scene = null;

scene = loader.load("x3dv/background/background.x3dv");
worldRoot.addChild(scene.getSceneGroup());
worldRoot.compile();
universe.addBranchGraph(worldRoot);
---------------------------------------------------------

Yes, my texture is power of 2, and if I use beas level model, it's all working fine....
Does everyone know why?

When I use mipmap mode in Texture component, I will get following error message..
----------------------------------------
java.lang.NullPointerException
   at javax.media.j3d.TextureRetained.checkSizes(TextureRetained.java:406)
   at javax.media.j3d.TextureRetained.setLive(TextureRetained.java:943)
   at javax.media.j3d.TextureUnitStateRetained.setLive(TextureUnitStateRetained.java:471)
   at javax.media.j3d.AppearanceRetained.setLive(AppearanceRetained.java:927)
   at javax.media.j3d.Shape3DRetained.doSetLive(Shape3DRetained.java:1066)
   at javax.media.j3d.Shape3DRetained.setLive(Shape3DRetained.java:891)
   at javax.media.j3d.GroupRetained.childDoSetLive(GroupRetained.java:2125)
   at javax.media.j3d.GroupRetained.doSetLive(GroupRetained.java:2180)
   at javax.media.j3d.TransformGroupRetained.setLive(TransformGroupRetained.java:549)
   at javax.media.j3d.GroupRetained.childDoSetLive(GroupRetained.java:2125)
   at javax.media.j3d.GroupRetained.doSetLive(GroupRetained.java:2180)
   at javax.media.j3d.BranchGroupRetained.setLive(BranchGroupRetained.java:160)
   at javax.media.j3d.GroupRetained.childDoSetLive(GroupRetained.java:2125)
   at javax.media.j3d.GroupRetained.doSetLive(GroupRetained.java:2180)
   at javax.media.j3d.TransformGroupRetained.setLive(TransformGroupRetained.java:549)
   at javax.media.j3d.GroupRetained.childDoSetLive(GroupRetained.java:2125)
   at javax.media.j3d.GroupRetained.doSetLive(GroupRetained.java:2180)
   at javax.media.j3d.BranchGroupRetained.setLive(BranchGroupRetained.java:160)
   at javax.media.j3d.GroupRetained.childCheckSetLive(GroupRetained.java:2132)
   at javax.media.j3d.GroupRetained.checkSetLive(GroupRetained.java:1527)
   at javax.media.j3d.GroupRetained.checkSetLive(GroupRetained.java:1448)
   at javax.media.j3d.GroupRetained.doAddChild(GroupRetained.java:483)
   at javax.media.j3d.GroupRetained.addChild(GroupRetained.java:456)
   at javax.media.j3d.Group.addChild(Group.java:266)------------------------------------------------------

The code(I use setInterleavedVertexBuffer(J3DBuffer) to set geometry's vertex data):-----------------------------------------
Appearance a = new Appearance();
       Material m = new Material(new Color3f(0.6f,0.6f,0.6f), new Color3f(0,0,0),
               new Color3f(1,1,1), new Color3f(0.8f,0.8f,0.8f),32);
       TextureLoader loader = new TextureLoader(image,"RGBA",
               TextureLoader.BY_REFERENCE|TextureLoader.GENERATE_MIPMAP, null);
       ImageComponent2D tImage = loader.getImage();
       int textureSize =
               RenderingCapabilityManager.getTextureSize(new Dimension(tImage.getWidth(),
               tImage.getHeight()));
       Dimension size = new Dimension(textureSize, textureSize);
       Shape3D shape = new Shape3D(this.createPlane(v), a);
       Texture2D texture =
               new Texture2D(RenderingCapabilityManager.getMipMapMode(),
               Texture.RGBA,size.width, size.height);
       int imageLevel =0;
       boolean mipMode =
               RenderingCapabilityManager.getMipMapMode()
               ==Texture.MULTI_LEVEL_MIPMAP;
       TextureAttributes ta = new TextureAttributes();
       TextureUnitState[] tus = new TextureUnitState[1];
       tus[0] =  new TextureUnitState(texture, ta, null);
       PolygonAttributes pa =
               new PolygonAttributes(PolygonAttributes.POLYGON_FILL,
               PolygonAttributes.CULL_NONE, 0, true);
       TransparencyAttributes tta = new TransparencyAttributes(TransparencyAttributes.NICEST, 1f);
       ta.setTextureMode(TextureAttributes.REPLACE);
       
       pa.setUserData(false);//don't modify PolygonAttributes
       a.setPolygonAttributes(pa);
       a.setTransparencyAttributes(tta);
       do{
           tImage = loader.getScaledImage(size.width, size.height);
           texture.setImage(imageLevel++, tImage);
           System.out.println(tImage);
           size.width >>=1;
           size.height >>=1;
       }while(size.width>1 && size.height >1 &&
               mipMode);
       texture.setMaximumLevel(imageLevel-1);
       //System.out.println(texture.getImage(imageLevel-1));
       a.setTextureUnitState(tus);
       a.setMaterial(m);
-------------------------------------------
But if I did't use mipmap mode, use baselevel mode, every thing is working fine..
I do't know why...Is everyone can help me~

My JDK is 1.5,Java3D API is 1.3.1(OpenGl) and video card is Geforce6800 Ultra
Thanks...

My JDK is 1.5 and Java3D API is 1.3.1
thanks~

I had try many times,but when I use
SceneGraphFileWriter writer = new SceneGraphFileWriter(file,universe,true,"test",null);to output scenegraph to the file,I will get node's attributes can't be read CapabilityNotSetException, and then I set all node's attributes' capability to ALLOW_READ.
Finally I get can't get RestrictedAccessException
so.....I think there is other method should be call,before I use SceneGraphFileWriter to export scenegraph..
If someone knows how to use, or sample code can be see.
Please tell me, thanks~