On the subject of exterior paint, I have the impression that in the modern day, primitive rural desert dwellings in the Middle East are rarely if ever painted on the outside, much less decoratively so, but there’s more of an established tradition for it in the desert regions of India. The following are all from Rajasthan except the last one which is from Gujarat, I think.
There are also painted huts in many African cultures, but I’m not sure which cultures exactly.
