Some semi-random thoughts on terrain generation

[xoft]

I've had a few ideas for overhangs, they're just in my head, I let them grow them a bit more, until they're ripe enough for implementing
The most likely scenario is that there will be a layer of terrain between "air" and "ground" layers that will use a 3D noise to give it some overhangs / holes / whatnot, and the height of this "hole layer" will be biome-dependent - it will range from thick in the extreme mountains, to non-existent in swamps.