Sorry about that last screenshot, I thought people would be more interested in the method rather than the map itself. I've been playing around with this a bit for a friend with kids.
Here's another one, this isn't a finished map for playing. I've added it for the developer's interests because it highlights a bug.
This map was generated by "maze", one of the set of Xscreensavers, as you can see bu the logo in the middle of the map.
I used WorldEdit's Set Nodes feature to convert the entire bottom layer to "dirt with grass" but it only converted on parts of the map that I'd already explored.
Also, as you can see in the next picture, the "strange shadows" bug is still there. The "shadow" extends to 16 blocks above sea level.
I'm not looking for answers to the problem, I can soon clean it up and make it look right. I just thought this might be of some use to the Minetest developers.
http://s000.tinyupload.com/index.php?fi ... 7286637369Cheers,
Andrew.