Blender 2.6: “remove doubles” for all objects

One of those “Google-holes”: you’re searching for something – and find nothing. So let’s fix this (and for me, it’s where I can find it again, kind of a web-clipboard).

Here’s the problem: Working with Blender, I imported a 3D scene from another program. After a few clicks, I realize that all vertices are duplicated (Collada import, and no way to change the export settings). Select, toggle edit mode, “remove doubles”, “recalculate normals” would be a valid approach for 10 meshes. But suppose you end up with several 100s? Right, there’s Blender’s built-in Python interpreter. So fire it up an any Blender window you like using the little button on the bottom left:

…and paste the following into that window (you might have to add one press of the return key). The script only works on the selected meshes (and ignores non-meshes), which makes it easier for really huge scenes – you might want to select only a few of them to get started, because Blender will be inresponsive during the script doing its job:

import bpy
if bpy.context.selected_objects != []:
	for ob in bpy.context.selected_objects:
		if ob.type == 'MESH': = ob 
			# remove doubles:
			# recalculate outside normals:
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5 Responses so far.

  1. Sebastian says:

    Thanks a lot man, I tried it on like 40 meshes and worked like a charm. You really made google a better place!

  2. google says:

    magnificent submit, very informative. I’m wondering why the opposite experts of this sector do not realize this. You should continue your writing. I am sure, you have a great readers’ base already!

  3. Abis says:

    Wow thank you sooooooo much. Very valuable script when being used with the cell fracture add-on. You should submit this script to the blender dev’s as an option in the cell fracture menu. Thanks again, you are a wonderful person.

  4. Peter says:

    Whow! Thanks a lot!!!
    Same Problem here with funktion “Tris to Quads” 🙂
    This script will help…

  5. Nath says:


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