BoxWidget in a vtkMultiVolume renderer with more than one volume

Development
1

Hello,

I render three volumes using the vtkMultiVolume renderer.

Know, I need to apply a BoxWidgets to clip/crop the volumes.
However, when I apply the BoxWidget, the Box is shown, but the Volume stays as it is.
When I render only one volume, it works as expected.

Does anyone know if VTK 9.x supports BoxWidgets in vtkMultiVolume renderer?

Thanks you very much.

2

How are you applying the box to the volume mapper? In the case of vtkMultiVolume you’d have to apply the clip planes to each individual mapper.

3

Thank you for your answer.

As mapper I use the vtkGPUVolumeRayCastMapper.

I am adding the volume (vtkImageData) as input to the BoxWidget and apply the vtkGPUVolumeRayCastMapper to the Observer: