From the campaign:
The FOLD FLAT terrain system allows you to create fully modular 28mm scale terrain layouts for your RPG or wargame. This set, BORDERLAND KEEP: Deluxe Edition, gives you everything you need to create your own keep design in a downloadable PDF format, and once you have the set you can print and build as many pieces as you like and never run out or need to purchase more. Additionally, our layer options allow you to customize your keep with options such as gargoyles, soldier statues, stains, ivy and more. This new PDF terrain set features our exclusive Fold-Flat designs, allowing you to fold the majority of your pieces flat for easy storage.