Transparency: shape disappear

I want to set transparency for some shapes. I do that by setting the TransparenyAppearance with the capability to write the transparency-value. If the value is different from 0.0, the hole shape geometry disappears. Does anyone know about? I tested all available transparency modes with no success. The GeometryArray is created with COLOR_3 flag, so I have no idea what's the problem...
Thanks,
David

Hi David,
I've tried the following code:
     BranchGroup              objBranch         = new BranchGroup();
     TransformGroup           objTrans          = new TransformGroup();
     ColorCube                cube              = new ColorCube(0.2);
     TransparencyAttributes   transparency      = new TransparencyAttributes( TransparencyAttributes.FASTEST, 1.0f );
     Alpha                    transparencyAlpha = new Alpha(-1, 2000);
     Appearance               tApperance        = new Appearance();
     TransparencyInterpolator tInterpolator     = new TransparencyInterpolator(transparencyAlpha, transparency, 0.0f, 1.0f );
     BoundingSphere           tbounds           = new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
     transparency.setCapability( TransparencyAttributes.ALLOW_VALUE_WRITE );
     tApperance.setTransparencyAttributes( transparency );
     tInterpolator.setSchedulingBounds(tbounds);
     cube.setAppearance(tApperance);
     objTrans.addChild(tInterpolator);
     objTrans.addChild(cube);
     objBranch.addChild(objTrans);and it works. As I've seen in the source code of class ColorCube, the geometry is constructed with per vertexcolor COLOR_3.
Do you use values between 1.0 and 0.0 for the value?
If so, you can try the source blend function "alpha" and the dest. blend function "one minus alpha". There is one notebook in my house, which only works well in transparency with this values.
Regards,
Oliver

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