Is there anything like an extension of POVRay that can
render the types of objects that are typically met in
the fields of differential geometry and low dimensional
geomtery.

Yes, I know that I can specify elementary shapes etc
without any 'extras', but it occurs to me that it isn't 
trivial to illustrate eg. a field of tangent vectors of
a surface or the effect of diverse transformations of
the surfaces.

Please, if you can help me with these things, answer on
my mail address: jan### [at] imagedk, as I'm moving to a new
job soon.

/jan

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