My question is: in povray does splines (linear,quadratic or cubic) permit to
define only curves or surface also?

and, if it's possible to use splines to define a surface, does its degree
have to be the same in "u" and "v" directions? or, for example, can I
define a spline surface that has degree 1 in one direction and degree 2 in
the other one?!?!

Thanks
Leo

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