Using Processing, you can use iterative mathematics to generate all sorts of forms for 3d printing. This is a work in progress, that only generates 2d templates - which you can import into a CAD program for thickening and then 3d printing.

Included is a printable 3d nautilus pattern made from my Processing App.

You can use the Processing Sketch to create for forms by dragging the sliders.

This is a work in progress: I need to find time to implement the openGL engine, but haven't done so yet!

But you can always use the 2d templates in your CAD program as a foundation for constructing 3d objects.

I hope you have fun!