The Baggy Green's A side, featuring five-day vice-captain Brad Haddin, Peter Siddle, Nathan Lyon and Pattinson, as well as Test hopefuls Usman Khawaja, Fawad Ahmed and Smith, closed a rain-affected day one of 248 for six.
That was thanks largely to a 109-run alliance between all-rounder Smith (104 not out) and Pattinson (42*), who rescued the situation after the top order had struggled.
Nic Maddinson went for six - one of Max Sorenson's four scalps - while Khawaja was cleaned up for a five-ball duck.
Alex Doolan did make 40 but Haddin's two and Siddle's duck meant trouble was brewing.
Moses Henriques made 47 to steady things, though, with Smith and Pattinson then easing the pressure before the rain came.
- Peter Siddle
- Usman Khawaja
- Brad Haddin