From the website:
On The Lamb Games and Warsenal have teamed up to announce the upcoming release of the Geomancer Modular Terrain System.
Geomancer will allow you to take your games of Endless: Fantasy Tactics to the next level, by giving you a fully modular 3D grid to play on.
Geomancer base sets will include an 8×8 base to match the scenarios provided in The Miasma War campaign expansion, and Endless‘ Free DLC. These bases can easily be linked together to create larger play areas in many configurations. More information on pricing, and exact contents will be released next month.