His work as a film director includes hit comedy Came a Hot Friday, an adaptation of classic New Zealand play The End of the Golden Weather, and What Becomes of the Broken Hearted?, the sequel to Once Were Warriors.

After time acting in the UK, he returned to his native New Zealand and won a Feltex award in 1975 after starring in one-off television drama Derek.

He played Winston Churchill in American telemovie Ike: Countdown to D-Day, and Buster Keaton in Lucy: The Lucille Ball Story.

Having helped script Donaldson's first feature film, dystopian thriller Sleeping Dogs, Mune also appeared on-screen alongside its star, Sam Neill.

Mune's other writing credits include adapting classic Ian Cross novel The God Boy into a well-regarded telemovie, the movie version of children's fable The Silent One,[6] and co-writing Goodbye Pork Pie, the first New Zealand feature to win large audiences in its home country.

Mune won further acclaim in 1991 for directing 'coming of age' drama The End of the Golden Weather, an adaptation of parts of Bruce Mason's classic one-man play.

Mune's other directorial projects include a feature-length documentary on comedian (and Came a Hot Friday actor) Billy T James, teenage drama The Whole of the Moon, and UVF thriller The Grasscutter.