I have a blend file with hundreds of mesh objects as part of a kit bash pack.

I want to copy each mesh to its own file and turn those files into KPacks for Kit Ops addon.

To export each mesh into a new file I tried to use this code:

import bpy

base_path = "c:\\temp\\"

for idx, obj in enumerate(bpy.data.objects):
    bpy.data.libraries.write(f'{base_path}obj_{idx}.blend', {obj}, fake_user=True)

The problem is that in the files created by the script, only the data blocks are copied, there are no meshes created.

How can I copy each mesh to a new file? It would be very tedious to do that manually for hundreds of files.

  • 1
    $\begingroup$ Could simply libraries.write(fp, use_fake_user=True) to stop orphans. Seems over kill to add a collection for a one object file. If using collections would add multiple objects to collection then write collection to lib. $\endgroup$ – batFINGER May 21 '20 at 19:32
  • $\begingroup$ @batFINGER You're right, that does stop the data from being orphaned. I was mistaken though, I don't need to copy just the data, but actual mesh. I need to have the objects visible and editable. Seems that just copying the data block is not enough, I have to find a way to copy the entire mesh to a new file. I updated my question to reflect this. $\endgroup$ – Virgiliu May 21 '20 at 23:38
  • $\begingroup$ Can't find the link, sure this has been asked before. Will notice on opening a library file that there is no scene. In later versions a dummy scene is created, to which it is simply a matter of linking objects, or using script as answered below. $\endgroup$ – batFINGER May 22 '20 at 2:34

Found how to do it. The code I had was half the solution.

After creating a new file, executing the following script adds the mesh to a collection in the scene as I needed. It assumes there's no collection and only one data block in the blend file.


import bpy

collection = bpy.data.collections.new("Collection 1")

To execute the script, I executed this in a loop:

blender.exe  <path_to_new_blend_file> --background --python add_object.py

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