But when Southee found the edge of Joe Burns bat, ending his honeymoon period in the series, and Boult had David Warner driving low to Tom Latham at cover, Australia were 46 for two.
However Smith is an assertive batsman and soon took charge, with Western Australian Voges his foil.
By the break, Smith had passed 50 off 57 balls, and was on 61 off 77 balls with nine fours, and Voges was on 43 with seven fours.
The first session of the day had belonged to Ross Taylor, whose 290 is the biggest score by a visiting player in Australia and the third top by a New Zealand batsman in a test.
The test has so far been an even stevens contest, bat thoroughly dominating the ball that it's hard to see a result coming out of the final four sessions. Australia lead the three-test series 1-0.
- By David Leggat in Perth