> You may care to look at InkScape, which is a free 2D SVG editor which can 
> output vector graphics based shapes as POV-Ray prism obect definitions. The 
> prism objects contain bezier_splines that you could use in POV-Ray to track 
> along the curves. You'd need to extract the splines and wrap it in 
> appropriate SDL for declaring the splines. If the shapes get complicated 
> you'd probably want to write a script to do that.

It can?! I have had Inkscape for long and I never saw such option! I 
might have an old version... *upgrades*

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