I thought it was quite humorous that their idea of fixing up the mud hut was to put flowers on it. I mean, you can put a dress on a pig, but it's still a pig... I think they should have kicked it down, made a bunch of dust clouds and such, and then built a nice hut over it.

I had three children in blue masks show up after "being lost". when I converted them then my villagers cleaned up the mud hut.

earthquke will give light above them u just have to do it over and over till they slowly change. You need to wait though till the light goes off to redo it or it's just a waste. So it takes a few days.

no particular skills are necessary. It's always happened automatically in all of my games once the last heathen has been converted: Villagers run over to the encampment and 'transform' it. Just takes them a few moments (not minutes), you will not see any scaffolding or % completed. I have attached an image below.

Other players have said they've had to drop a villager on the mud hut once the last heathen has been converted to get the process going. I've never had to do that. I am on a iMac running OS X 10.4.11