Symmetrical template.

Initially, it was set up correctly. With the L-U option and 2 or 4 players, it creates a map, but without a Dungeon. It doesn't generate with other settings.

h3dm1, it seems to be generated like this: a single plane is generated based on a template, and the rest is drawn by the symmetry generator when duplicating. However, I'm not sure about 2 players: it only creates one secondary area on the plane and 2 tertiary areas – a total of 4 zones, which seems a bit small for an L-shaped map.