I read the docs before my post. I try never to ask questions here, that I
can read about and understand somewhere else. I wanted to understand why the
cubic splines in Pov3.5 differ mostly from the yellow circle at the
endpoints. I explained my theories that might be wrong.

Thanks for your reply.
Hugo



> So check cubic_spline desciption within Lathe chapter
> (6.5.1.7) - perhaps there could be some answers to your question.

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