See this thread:
http://news.povray.org/povray.general/thread/%3C5684fe08%241%40news.povray.org%3E/
From: kurtz le pirate
Subject: Ribbon following spline
Date: 31 Dec 2015 10:06:00

The source code can be found here:
http://news.povray.org/povray.binaries.scene-files/thread/%3Cweb.568b5053c1e7e03f2fc085110%40news.povray.org%3E/
From: Tor Olav Kristensen
Subject: Illustrating Freneset frames along parametric curve
Date: 5 Jan 2016 08:45:04

--
Tor Olav
http://subcube.com

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