No Changes when setting shade

Web
1

I am rendering a volume and I tried to set the shade to 1 just like https://kitware.github.io/vtk-js/examples/TestVolumeTypes.html but the example showed an obvious different while mine did not. I was just curious if there are other things I need to set up too in order to see a difference.

2

Can you please post a code snippet of what you are doing? That way we can have a better idea of what you are doing and what needs to be changed.

3 
      const reader = vtkXMLImageDataReader.newInstance();
      const volumeMapper = vtkVolumeMapper.newInstance();
      const volumeActor = vtkVolume.newInstance();
      const cropFilter = vtkImageCropFilter.newInstance();

  reader
  .setUrl(`./${fileName}`, {loadData:true, progressCallback,})
  .then(() => {
   const data = reader.getOutputData();

   *** Processing the data a little bit and set it to a labelmap ***

    cropFilter.setInputData(labelMap);
    const lookupTable = vtkColorTransferFunction.newInstance();
    const ofun = vtkPiecewiseFunction.newInstance();
    ofun.addPoint((max/2), 1.0);
    ofun.addPoint(0, 0);
    ofun.addPoint((max), 0.0);
  lookupTable.setNumberOfValues(dataRange[1]- dataRange[0]+1);
  lookupTable.setDiscretize(true);
  volumeActor.getProperty().setShade(1);
  volumeActor.getProperty().setUseGradientOpacity(0, false);
  volumeActor.getProperty().setOpacityMode(0,1)
  volumeActor.getProperty().setAmbient(0.0);
  volumeActor.getProperty().setDiffuse(0.0);
  volumeActor.getProperty().setSpecular(0.8);
  volumeActor.getProperty().setSpecularPower(30.0);
  volumeActor.getProperty().setRGBTransferFunction(0, lookupTable); 
  volumeActor.getProperty().setScalarOpacity(0, ofun);
  volumeMapper.setInputConnection(cropFilter.getOutputPort());
  const sampleDistance =
  0.7 *
  Math.sqrt(
  data
    .getSpacing()
    .map((v) => v * v)
    .reduce((a, b) => a + b, 0)
  );
volumeMapper.setSampleDistance(sampleDistance);
volumeActor.setMapper(volumeMapper);
renderer.addVolume(volumeActor);
}

Here is a snippet of it, I removed some of the data processing I was doing which basically just took values that are extremely large or small and mapped them to be closer to the dataset.

4

I solved the issue it was because I added
volumeActor.getProperty().setOpacityMode(0,1)
Which I think somehow caused the renderer to override the shading.