Jo,
Thank you kindly.
But.. A 'surface' (which I agree) can only be be made of 'matter' or not 'exist', so should involve the particulate state of energy. The simplest particulate form is a rotating sphere. Ergo I invoke the simplest dynamic, or at least the most 'familiar'.
If it's not the simplest; then it isn't! It's unimportant. What IS important is the missing spin momenta which has made confusing spooky nonsense of the physics of the quanta. THAT is what's simplified, then also simplifying & uniting with Relativity.
Now everything can be or 'have' a refractive plane surface (near/far field TZ) and in all directions, so localising all physics everywhere.
Of course the 'matter' condenses from the sub-matter continuum condensate energy on perturbation, (or Higgs process if you prefer) but if we discuss that some may think I'm loosing my marbles!
Best
Peter