walls_extended needs no bottom faces
@@ -604,7 +604,8 @@ class LevelGeometries:
upper = interpolator(*np.transpose(self.vertices)).astype(np.int32) - int(0.7 * 1000)
self.walls_extended.build_polyhedron(self._create_polyhedron,
lower=vertex_wall_heights,
- upper=upper)
+ upper=upper,
+ bottom=False)
else:
self.walls_extended = None
