So this is based on a very quick model I made just after I finished copying the Hearthling Model voxel by voxel. Took about 20 minutes out of game, and just shy of 3 hours in game to just design. Then it took another 18 hours to actually build. It’s a single slab template structure and I learned quite a bit about how the AI works and its flaws in terms of building from this statue.
Saved Template (Created in Alpha 9, might not work in future versions)
One rule of the AI is to always attempt to finish fully connected same colored slabs before moving on to another color. This caused a ton of frustration when my Hearthlings got to the top of the statue. The head is one color and its completely surrounded by a another to create the helmet. This basically means that 2 Hearthlings working side by side if they pick different colors to work on tended to have one Hearthling build the other Hearthling into the statue with no regard for their poor little lives.This is due to the outside darker color having less voxels then the inside. To finish this I had to create parties of my builders and micromanage them when they got close to the top.
I got frustrated enough with the Hearthlings I even opened up the AI routines to find the build code to see if I could create a fix, after all my background is in AI. But I was unable to find any building tasks. All I could find is the fact there is a build dependency graph saved into the statues template itself. but maybe I was looking in the wrong area and someone can point me where to look.