Hey @jbweston can you put up the example notebook for producing the above plot somewhere?

I had though about that before, but the four points which are found are co-planar, so it doesn't matter in what way you make the triangles. The roughness comes from differences between adjacent tetrahedra.

@jhoofwijk thanks for the clarification, that's an excellent point.

OTOH the isosurface seems to have artifacts... wondering how to investigate the specific origin of those...