Hello,
A new update was released today, introducing some changes in terrain and two new items:
Pickaxe
The Pickaxe can be crafted in survival and let you change the terrain: left click to dig, right click to add material back to the ground.
Sapling
The Sapling can be crafted in survival and will turn into a tree after a while.
Terrain
The transition between materials has been totally rewritten to be more natural.
A lot of new terrain type has been added: lava, black rock, etc... Currently you can only see them in Creative mode by placing them with the Terraforming Material Rod.
In the future, new biomes will be added and will use those materials.
Thank you again for your support!