Not that I know of.
I was taking a look at the exported svg / pdf files and it seems like the current implementation of those exporters in Processing is very simple and not optimized. Ellipse borders become tons of segments and the fills become many triangles, when the border could be just one segment with many points, same for the fill.
The issue with that is that the resulting file is not easily editable in something like Inkscape.
I also took a look at doing the same in openFrameworks. The exporter is better (paths with many vertices are ok, circles are not made out of triangles) but I could not get 3D shapes exported correctly (in my brief tests).
I don’t know if it helps, but you could calculate which plane of each pair is closer to you and render that, skipping the one that is farther.
Update: one more option would be using three.js. It has an SVG renderer. three.js svg - sandbox An example: Using Three.js to Create Vector-Graphics from 3D-Visualizations Right in Your Browser - Felix Breuer's Blog