> > horrible concrete boxes

> The cubic shape has the best utilisation of materials per unit of usable space. Houses must be cubical.

I think parent was describing combination of box-like aesthetics with the unpleasantness that is concrete.

I think you may be mistaken - domes are perhaps a better utilisation per unit of usable space.

Also, it's definitely not the case that houses must be cubical, for any reason(s), let alone just to attempt to maximise the ratio of materials per unit of area / volume.

Humans need natural light. Big cubes have a low proportion of rooms with natural light.