Skiba wrote: 

> In 3.5 we have two tokens: bezier_spline and quadratic_spline - is it
> situation when the same shape is produced under different names?

No, the bezier used in POV-Ray is cubic.

> Or is quadratic_spline class of splines just like cubic_spline ?

Yes

An interesting introduction on splines:
http://www.ddt.pwp.blueyonder.co.uk/evgeny/Intro/Intro.htm

Ingo

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