It's more that this is my problem:
People started farming, built fences of wood to keep the animals in. Soon they realised that it was also good at keeping intruders out, and started building bigger and better fences, even electric ones.
And then they went to space. Built all this really fancy stuff, hulls to stop damage, fancy doors, and when the hull was no longer enough, they designed hardened hull. And when that wasn't wnough to keep up with these huge weapons that were built, they designed really advanced shields.
And then you want to essentially go back to the stone age.
And now nicer:
I know what you mean (I think). Some smaller than full blocks that aren't capsules, wedges, corners, tetras or pentas would be nice. That way rooms could be emptier (minecraft glass pane style).