Fix #5984. Incorrect axis usage when generating slabs.

src/bonsai/bonsai/bim/module/model/slab.py

@@ -188,6 +188,10 @@ class DumbSlabGenerator:
 
         pset = ifcopenshell.api.run("pset.add_pset", self.file, product=element, name="EPset_Parametric")
         ifcopenshell.api.run("pset.edit_pset", self.file, pset=pset, properties={"Engine": "Bonsai.DumbLayer3"})
+
+        material = ifcopenshell.util.element.get_material(element)
+        material.LayerSetDirection = "AXIS3"
+
         obj.select_set(True)
         return obj