Blender Script Library

Apply All Modifiers

🗒️ Blender Version: 4.0+

📦 Required Addons: None (built-in modules only)

📝 Description: This script applies all the modifers in the open blend file.

  import bpy

  # Select all objects
  bpy.ops.object.select_all(action='SELECT')

  # Iterate over all selected objects
  for obj in bpy.context.selected_objects:
      # Make the object the active object
      bpy.context.view_layer.objects.active = obj

      # Iterate over all modifiers in the object
      for mod in obj.modifiers:
          # Check if the modifier is not applied
          if mod.type != 'ARMATURE' or not mod.show_viewport:
              # Apply the modifier
              bpy.ops.object.modifier_apply({"object": obj}, modifier=mod.name)

Remap Materials

🗒️ Blender Version: 4.0+

📦 Required Addons: None (built-in modules only)

📝 Description: This script is another way to change everything that has one material to a new material.

  import bpy

  # Define the names of the materials
  old_material_name = "oldMaterialHere"
  new_material_name = "newMaterialHere"

  # Get the new material
  new_material = bpy.data.materials.get(new_material_name)

  # Ensure the new material exists
  if new_material is None:
      print(f"Material '{new_material_name}' not found.")
  else:
      # Iterate through all objects
      for obj in bpy.data.objects:
          # Ensure the object has material slots
          if obj.data and hasattr(obj.data, 'materials'):
              for i, mat in enumerate(obj.data.materials):
                  # If the material is the one to be replaced, change it
                  if mat and mat.name == old_material_name:
                      obj.data.materials[i] = new_material
                      print(f"Changed material on object '{obj.name}' from '{old_material_name}' to '{new_material_name}'.")

      print("Material replacement completed.")

Delete All Empties

🗒️ Blender Version: 4.0+

📦 Required Addons: None (built-in modules only)

📝 Description: This simple Blender script automatically finds and deletes all Empty objects in your scene, helping you quickly clean up unused markers or placeholders.

  import bpy

  # Iterate through all objects in the current scene
  for obj in bpy.data.objects:
      if obj.type == 'EMPTY':
          bpy.data.objects.remove(obj, do_unlink=True)

  print("All empty objects have been deleted.")

Delete All Materials

🗒️ Blender Version: 4.0+

📦 Required Addons: None (built-in modules only)

📝 Description: This Blender script deletes all materials in your scene at once, making it easy to clear out unused or unwanted materials for a clean slate.

  import bpy

  # Get all materials in the scene
  materials = bpy.data.materials

  # Iterate through all materials and remove them
  for material in materials:
      materials.remove(material)

  # Print a message to confirm that the materials have been removed
  print("All materials have been deleted.")

Delete All Objects From Empties

🗒️ Blender Version: 4.0+

📦 Required Addons: None (built-in modules only)

📝 Description: This script loops through all selected objects in your scene and checks if they’re Empty objects. If an Empty has children, it deletes each child object, helping you clean up hierarchy clutter.

  import bpy

  # Loop through all selected objects
  for obj in bpy.context.selected_objects:
      # Check if the object is an Empty
      if obj.type == 'EMPTY':
          # Check if the empty has children
          if obj.children:
              # Loop through the children and delete each one
              for child in obj.children:
                  bpy.data.objects.remove(child, do_unlink=True)
          else:
              print(f"Empty '{obj.name}' has no children.")
      else:
          print(f"'{obj.name}' is not an Empty.")

Delete All Objects From Empties except Parent

🗒️ Blender Version: 4.0+

📦 Required Addons: None (built-in modules only)

📝 Description: This script finds and deletes all non-empty objects that are not part of the MAIN collection. It’s useful for cleaning up unwanted objects while keeping your main assets safe.

  import bpy

  # Get the collection named 'MAIN'
  main_collection = bpy.data.collections.get('MAIN')

  # Check if the collection exists
  if main_collection:
      main_objects = set(main_collection.objects)
  else:
      main_objects = set()

  # Iterate through all objects in the scene
  for obj in bpy.data.objects:
      # Check if the object is not an empty and not in the 'MAIN' collection
      if obj.type != 'EMPTY' and obj not in main_objects:
          # Select the object
          obj.select_set(True)
      else:
          # Deselect the object
          obj.select_set(False)

  # Delete all selected objects
  bpy.ops.object.delete()

  print("All non-empty objects not in the 'MAIN' collection have been deleted.")

Remove All Unused Materials

🗒️ Blender Version: 4.0+

📦 Required Addons: None (built-in modules only)

📝 Description: This script scans your entire Blender file for unused materials and deletes them, helping you keep your project organized and free of clutter.

  import bpy

  def remove_unused_materials():
      # Get all materials in the blend file
      all_materials = bpy.data.materials
      
      # List to store materials that are used
      used_materials = set()
      
      # Iterate through all objects to collect used materials
      for obj in bpy.data.objects:
          if obj.data and hasattr(obj.data, 'materials'):
              for mat_slot in obj.data.materials:
                  if mat_slot:
                      used_materials.add(mat_slot)

      # Remove unused materials
      unused_materials = [mat for mat in all_materials if mat not in used_materials]
      for mat in unused_materials:
          all_materials.remove(mat)
      
      print(f"Removed {len(unused_materials)} unused materials.")

  # Run the function
  remove_unused_materials()