Outpost - Building 1.25" (31.75mm hex) Building BattleTech (or any other game you can make it work on), fits in with the other "Outpost" wall terrain I have up here:

https://www.myminifactory.com/object/3d-print-magnetic-hex-walls-wowers-terrain-by-punykaiju-264025

The pieces are:

One "5 Hex" Building.
Designed with holes for circular magnets for snap together terrain, just double check your magnets polarity before gluing.

The "teardrop" holes will fit (2/3/4/5mm) disc magnets, I like the (5mm wide/2mm depth) personally:

After printing, just set the magnet in and add a drop of glue, (I'm a fan of thin CA glue).

These is designed so (almost) any FDM printer can print with no supports needed. The largest overhang angle is approx 55-58 degrees.