I’ve started working on a Stygian building kit based on the stuf in Sepermeru. The meshes are stupid simple, but kinda had to be so the corner bevels would line up. The first attempt had a slight curve in the walls, which worked fine on outside corners but resulted in gaps inside. On the bright side, the low poly count should be good for performance on big structures.
It still needs slopes, fences, and foundations, but here’s a screenshot so far: