I am looking for a render engine capable of rendering vectors, i.e. vertices, edges, curves, etc -- objects that have no volume & no faces.
I'd also like the render engine to be free.
Below is an example what I am trying to accomplish. See how there are only points and lines in the image? That's the style I'm wanting to achieve.
I am also hoping the render engine can make much nicer pictures than this (higher resolution, control over materials, transparency, etc), and also to make animations.
Given these constraints, are there any vector render engines that stand out as good solutions?