Hi all.

I noted a strange behaviour on cubic_spline when I define paths with the 
spline  keyword. In previous version of Pov-Ray the first and last 
points of the spline were to set the tangent of the second and the last 
but one point. So the first and last "stretchs" between first-second and 
last but one-last points were straight.

In 3.6 version this is not this way so, why this behaviour on the new 
version or am I wrong ?

Thanks. See ya.

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