The presence of 2 strategically placed 2x2x2 blocks would reduce the minimum side of the range from 35 to 21
Discussion
Actually it's possible that there are 0 cubes, and just square panes
Wouldn’t I see those 2x2 blocks on the top, side or back view? Just counting the visible “cubes” leads you to a minimum of 35. 2x2 cubes wouldn’t have a dividing line between them…
