The Weyl double copy from twistor space

The Weyl double copy is a procedure for relating exact solutions in biadjoint scalar, gauge and gravity theories, relates fields spacetime directly. Where this comes from, how general it is, have until recently remained mysterious. In paper, we show the current form scope of can be derived from certain twistor space. new formalism shows that more than previously thought, applying particular to with arbitrary Petrov types. We comment on obtain anti-self-dual as well self-dual fields, clarify some conceptual issues approach.