[JAVA3D] how to make an object in VRML file transparent?

[cs]

Hi,everyone!
I use VRML97.jar to load a VRML file in Java3d.
there is a shape and it's Material is  as following:
Shape {
          appearance Appearance {
            material Material {
              transparency 0.5 ----!!!!
            }
          ...
         }
       }
but in java3d the shape I see is not a transparent one.
so VRML97.jar did no support the key word "transparency "?
I can obtain a TransformGroup (it is that shape)in java3d,but how can I make it 
transparent ?

Thanks!

Martin

　　　

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