A way to bulk remove all the blender materials that are not used in the scene.

This was helpful for me. Logging here for others.

Is a way to bulk remove all the blender materials that are not used in the scene.


import bpy


def remove_unused_materials():

    # Get all materials

    materials = bpy.data.materials



    # Track the number of materials removed

    removed_count = 0


    for material in materials:

        # Check if the material has no users

        if material.users == 0:

            # Unlink and remove the material

            materials.remove(material)

            removed_count += 1



    print(f"Removed {removed_count} unused materials.")


# Call the function

remove_unused_materials()