fix stupid faces=None bug
@@ -443,7 +443,7 @@ class LevelGeometries:
upper=vertex_wall_heights,
bottom=False)
for key, geometry in self.restricted_spaces_outdoors.items():
- geometry.faces = None
+ geometry.faces = ()
self.walls_base.build_polyhedron(self._create_polyhedron,
lower=self.min_altitude - int(0.7 * 1000),
