they have mentioned eventually to have a class that does landscape blocks. Geomancer. Of course it is obviously not in, but hopefully further down the line it will be added so we can have our way of making dirt tiles… or reforming the landscape.
Right now though there is a lovely mod that fulfills it to some extent for now.
http://discourse.stonehearth.net/t/mod-slabs-with-terrain-colors-a14/14957
It is the closest we will get for a bit, at least until they get to that specific function/class. After all the mechanics behind it have to be fleshed out; don’t know how much they have as yet. Just know at least the idea of the class in a basic way being poked at. 