Contour lines in render ?

Hi all is there a way to replicate Vray Toon effect with Corona. I have tested the Wire Map but it is made for a different implementation. I would like to render with contour lines. Any ideas ?

There was similar discussion recently. Take a look, maybe you’ll find somethink useful: Has corona anything like "toon core" has in the case of vRay? - Corona for 3ds Max :: Help Required - Chaos Forum

Thanks for pointing me the topic. Sadly the options tested there are too hard to implement on a bigger more complex scene. It will be great if the Corona Team can add such a feature in the render.