High quality and low complexity vector graphics. By high quality I mean clear, nice and customizable.
By low complexity I mean direct generation of SVG/PDF primitives : opengl2ps is horrible for that purpose, for instance opengl spheres are approximated by thousands of triangles instead of just being represented as a SVG/PDF circle primitive. And vector graphics is just the way to go in almost any case. As a bonus, please do no provide direct jpeg export.
