A bit off the track: Ruth some years ago wrote a Python module that can be imported into a VPython program to export scenes to Pov-Ray. She looks at the VPython scene and writes out a plain text file (or files) representing that scene in Pov-Ray scene description language. Then one can render the scene in Pov-Ray with much higher quality than is possible in the real-time VPython OpenGL rendering. We have used this extensively to make 3D images for our physics textbook.
Bruce
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