The artwork, described as a "sister-image" to Reynolds' video, is a silent portrait of Reynolds on 35mm black and white film and shown at the Chisenhale Gallery in London. Commentators said it reflected Thompson ongoing questions about race, class and social inequality.
Four years ago and then aged 26, Thompson became the youngest artist ever to win New Zealand's Walters Prize. Inthisholeonthisislandwhereiam took viewers on a taxi ride to an old house belonging to Thompson's mother.
The international judge, Charles Esche, director of the Van Abbemuseum in the Netherlands and curator of this year's Sao Paulo Biennale, said Thompson's work cut "through the protocols of the exhibition system like a knife ... Anticipation, uncertainty, uneasiness and privilege all play their part in charging a sense of personal displacement".
Thompson, who has also been based in Frankfurt, returned home earlier this year for his first major solo exhibition. Held at the Adam Art Gallery in Wellington, he exhibited three moving-image works including autoportrait and a new work, How Long?, made in Fiji where his father was born.
Gallery curator Stephen Cleland said Thompson's subjects have complex and sobering personal histories — as detailed in the accompanying wall texts — that allude to real-life violence.
"These cinematic portraits bring us face to face with those who've lost loved ones or who are linked to scenes of tragic conflict. On the surface, they're very simple, but spending time with them opens up deeper levels."
Thompson's work will now be exhibited, with other shortlisted finalists, at the Tate Gallery from September to January, 2019, as part of the Turner Prize exhibition.