Hi Rudl, yeah if you need planar quads then you'll just can't really use any method that generates curved shapes like that projection does, things that are all curvy will not be planar at the same time...

You probably need to think more about starting some piece of the construction with a plane itself and then generate more pieces by something like intersecting that plane with other parts, that way you know that the result is planar. That's basically how the method that I wrote above works, I think that may work for you...

- Michael