We aren't able to personally attend GDC this year but we will be there in spirit. Shape of the World was featured as part of Houdini's Demo Reel this year, highlighting the ways Houdini can be used to make procedural models on reduce schedules and budgets. A good thing indeed for indies.
Our friend Stephen Tucker at Allegro Digital made all the procedural models for the seeds you collect in the game, making it quick to do multiple variations on each one. You can read a little bit about his process on his blog here.
Check out the Houdini folk at GDC if you are there and say hi for us!