City Gallery’s autumn programme is set to draw punters indoors. Colin Mccahon: On Going Out with the Tide (April 8-July 9) will occupy the entire first floor of the gallery, with major works from 1965-1976, a period in which Maoritanga was Mccahon’s muse. Included is “The Canoe Tainui”, which recently became the most expensive work ($1.35m) to sell here at auction. Martino Gamper: 100 Chairs in 100 Days (April 8-August 13) features the poetic, often humorous and unexpected forms made from found objects by the London-based Italian designer – with the 100th chair being created especially for this exhibition. Waiting for paint to dry proved too tedious for La-based digital artist Petra Cortright, who prefers to “paint” by cutting and pasting internet-sourced imagery using online software. Running Neo-geo Games Under Mame (April 8-August 13) shows why she’s been called “the Monet of the 21st century”.