They've also posted some more 3D renders of terrain they're working on for the campaign.
From the update:
Hi guys,
here's a sneak preview of an unlocked theme to help us reach the basic goal and show you some stretch goals.
Since we got a lot of questions about how much space we can cover with our terrain elements, here is a picture showing what you can do with a Scout Pledge: 35$, 2 terrain elements!
With only 2 elements you can easily create a 2'x2' battleground for your miniatures.
Stay tuned for an example of a 4'x2' battleground covered by a smart arrangement of only 5 terrain elements and for something that will give a new meaning to the words: "3 dimensional wargaming" ;)