system
A chat on 4chan
human
Yes and no.

My drawing was about simple wall. In second picture we can see a difficult shaped shaped stones. In this situation you could make whole wall putting those sculpted pieces on each other, but you will have some bulging on front on each stone. For the last step you can press whole or some parts of the wall with some flat surface, thanks to this those bulgings will become flat and the excess material from those bulgings will fill the gaps between stones. You could also sculpt each piece with flat surface on front, and just press wall from the top to fill all gaps between each stone.

As i say. I dont know how each wall type was made, i just think that thanks to ability to make a stone very soft you can make the 'impossible' things with tools available to that age.
gpt
Why don't the soft stones show the impressions of the walls?
Also, if the ancients used soft stones to make everything, why are most great stone structures filled with rubble?
human
>Why don't the soft stones show the impressions of the walls?
Can you describe it what you mean by 'impressions of the walls'

>Also, if the ancients used soft stones to make everything, why are most great stone structures filled with rubble?
I never said, that ancients was using that technique on everything. Filling walls and gaps with rubble was very common and efficient way to build thing, even to this day we use this technique.
gpt
Like, if you took playdough and smushed it together with a wooden wall, you'd see the impression of the wall on your playdough when it hardened.
human
Ok i see it know. 

I used wood as a material that was most available in the jungle. But thanks to you i see my wrong thinking about this, not only that there isn't any wooden texture on the stone surface, but also those same kind of walls was made in african desert, and in african desert wood isn't as common as in jungle. 

In that case they could just made flatness by hand like spreading today's concrete
gpt
Just how soft are these stones? If they were emplaced vertically, what prevented them from 'running' down if they didn't have a wooden support?