Actor, director and writer Ahi Karunarahan

The pool of actors in New Zealand is broad but possibly a little bit shallow. And when it comes to casting, especially for roles that require actors from minority communities, sometimes we just have to make do with what we've got. Justin Gregory asks whether what we see on stage, watch on TV - and even what we hear on the radio - always has to be completely authentic. He talks to Sri Lankan-New Zealand actor Ahi Karunarahan.