A preference to list those classes that are not affected by the 'cut decorator'.

src/bonsai/bonsai/bim/module/drawing/decoration.py

@@ -1650,9 +1650,15 @@ class CutDecorator:
         all_vertex_i_offset = 0
         selected_vertex_i_offset = 0
 
+        classes_no_cut_str = bpy.context.scene.DocProperties.classes_no_cut
+        classes_no_cut = [word.strip() for word in classes_no_cut_str.split(",")]
+
         for obj in [o for o in bpy.context.visible_objects if o.type == "MESH"]:
             if not (element := tool.Ifc.get_entity(obj)):
                 continue
+            #Skip the elements in the following classes
+            if element.is_a() in classes_no_cut:
+                continue
             self.decorate(context, obj, element)
 
             verts, edges = DecoratorData.cut_cache[element.id()]
@@ -1720,6 +1726,9 @@ class CutDecorator:
         batch.draw(shader)
 
     def decorate(self, context, obj: bpy.types.Object, element: ifcopenshell.entity_instance) -> None:
+        
+
+
         has_cut_cache = element.id() in DecoratorData.cut_cache
         has_fill_cache = element.id() in DecoratorData.fill_cache
 

src/bonsai/bonsai/bim/module/drawing/prop.py

@@ -449,6 +449,12 @@ class DocProperties(PropertyGroup):
         name="Classes to Wireframe",
         description="Upon import, these classes will display as wireframe.\nEx: IfcVirtualelement, IfcSpace",
     )
+    classes_no_cut: StringProperty(
+        default="IfcVirtualElement, IfcSpace",
+        name="Classes that are not cut",
+        description="The cut decoractor will be turned off for these classes\nEx: IfcVirtualelement, IfcSpace",
+    )
+
 
     if TYPE_CHECKING:
         should_use_underlay_cache: bool

src/bonsai/bonsai/bim/ui.py

@@ -420,6 +420,7 @@ class BIM_ADDON_preferences(bpy.types.AddonPreferences):
         layout.prop(dprops, "imperial_precision")
         layout.prop(dprops, "tolerance")
         layout.prop(dprops, "classes_to_wireframe")
+        layout.prop(dprops, "classes_no_cut")
 
     def draw_decorator_colors(self, layout, context):
         layout.row().prop(self, "decorations_colour")