"The curves had been worked out by the artist many years ago without knowing that this space existed. What a joyful thing that it's in Masterton not in Auckland."
Aratoi director Alice Hutchison said it was her most ambitious exhibition for the gallery.
"This is the big one - it's the most important exhibition I have worked on in this country.
"I hope that it appeals to a really broad audience. You don't need to have a background in art history to appreciate it."
The exhibition, which is exclusive to Aratoi, also includes a series loaned from Te Papa's collection.
Mrkusich is a ground-breaking artist, Ms Hutchison said.
"From the beginning he was a pioneer in this country that kept challenging himself, doing things in this country that hadn't been done before."
The 89-year-old artist lives in Auckland and was not well enough to travel to Masterton for the opening. The exhibition runs from October 24 until January 31.