Comments

• sjb007

  September 2025

  No reason why not. Ironically I created a PR that did the opposite of what you are asking for; Blender Custom Properties to Pset values. Maybe that will give you some clues...

  
• Bedson

  September 2025

  Thanks for the link.
  I'm not a coder and I can't seem to get the correct imports for working with the IFC data....I'm trying to get an AI to help but it seems stuck on which imports to use too....
  `import bpy
  import ifcopenshell
  import ifcopenshell.api
  from ifcopenshell.util.pset import PsetQto

  Define the target PSet names

  TARGET_PSETS = {"PP_Description", "PP_Description_Model", "PP_Description_Size"}

  def add_custom_properties_from_psets():
  ifc_file = ifcopenshell.api.run("context.get_file", None)
  if not ifc_file:
  print("No IFC file found.")
  return

  # Iterate over all products in the IFC file
  for product in ifc_file.by_type("IfcProduct"):
      if not hasattr(product, "IsDefinedBy"):
          continue
  
      for rel in product.IsDefinedBy:
          if rel.is_a("IfcRelDefinesByProperties"):
              pset = rel.RelatingPropertyDefinition
              if pset.is_a("IfcPropertySet") and pset.Name in TARGET_PSETS:
                  blender_obj = ifcopenshell.api.run("blender.get_object", ifc_file, product=product)
                  if not blender_obj:
                      continue
  
                  for prop in pset.HasProperties:
                      if prop.is_a("IfcPropertySingleValue"):
                          prop_name = prop.Name
                          prop_value = str(prop.NominalValue.wrappedValue)
  
                          # Add custom property to Blender object
                          blender_obj[prop_name] = prop_value
                          # Optional: make it visible in UI
                          if "_RNA_UI" not in blender_obj:
                              blender_obj["_RNA_UI"] = {}
                          blender_obj["_RNA_UI"][prop_name] = {"description": f"Imported from {pset.Name}"}
  

  add_custom_properties_from_psets()`
• Bedson

  September 2025

  When I run a simplified script to just report the value of one named PSet on one selected object, nothing is found depsite that Object having it's PSet name and value shown in Bonsai. Does Bonsai use different PSet Names under the hood (perhaps a prefix or suffix)?
  import bpy
  import bonsai.tool as tool
  import ifcopenshell.util.element

  class ReportPsetValue(bpy.types.Operator):
  """Report the value of PSet PP_Description for the selected object in the console"""
  bl_idname = "object.report_pset_value"
  bl_label = "Report PSet Value"
  bl_options = {"REGISTER", "UNDO"}

  def execute(self, context):
      obj = context.active_object
      if not obj:
          self.report({'WARNING'}, "No object selected")
          return {'CANCELLED'}
  
      element = tool.Ifc.get_entity(obj)
      if not element:
          self.report({'WARNING'}, "Selected object is not an IFC entity")
          return {'CANCELLED'}
  
      psets = ifcopenshell.util.element.get_psets(element, should_inherit=True)
      pp_description = psets.get("PP_Description", None)
  
      if pp_description:
          print(f"PSet PP_Description for '{obj.name}': {pp_description}")
          self.report({'INFO'}, "PSet value reported in console")
      else:
          print(f"No PSet 'PP_Description' found for '{obj.name}'")
          self.report({'WARNING'}, "No PSet 'PP_Description' found")
  
      return {'FINISHED'}
  

  Register the operator

  bpy.utils.register_class(ReportPsetValue)

  To use: Select an object, then run bpy.ops.object.report_pset_value() or search via F3
• Bedson

  September 2025

  I've worked it out - the PSet is a collection. The Collection is like a dictionary of the Parameter Names and Values (Revit Project Parameters with their Values). All working now.