Jonathan <jon### [at] hotmailcom> wrote:
> I would know a little bit much about how povray compute splines, and what
> mathematical method of interpolation is used.

  For the math behind splines, this should get you started (follow the
links to the different types of splines):

http://mathworld.wolfram.com/Spline.html

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -

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