### Description

!!! note
    The original source code for this example is [here](https://gitlab.kitware.com/vtk/vtk/blob/73465690278158b9e89661cd6aed26bead781378/Examples/Rendering/Cxx/SpecularSpheres.cxx).

!!! info
    Similar examples setting the diffuse and specular properties are:
    See [DiffuseSpheres.cxx](https://lorensen.github.io/VTKExamples/site/Cxx/Rendering/DiffuseSpheres/), [DiffuseSpheres.py](https://lorensen.github.io/VTKExamples/site/Python/Rendering/DiffuseSpheres/) and [SpecularSpheres.cxx](https://lorensen.github.io/VTKExamples/site/Cxx/Rendering/SpecularSpheres/), [SpecularSpheres.py](https://lorensen.github.io/VTKExamples/site/Python/Rendering/SpecularSpheres/).
