An alternative to vtkVolumeRayCastCompositeFunction in the latest version.
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Alternative to vtkVolumeRayCastCompositeFunction in the latest version
You may be looking for classvtkOpenGLGPUVolumeRayCastMapper.
https://vtk.org/doc/nightly/html/classvtkOpenGLGPUVolumeRayCastMapper.html
BTW, this is an english speaking discussion board, please try writing in english.
Thank you for your advice.