How to clean materials and texture copies?

Support Materials and Textures
7

You can try the following script:

import bpy

mats = bpy.data.materials

for mat in mats:
    (original, _, ext) = mat.name.rpartition(".")
    
    if ext.isnumeric() and mats.find(original) != -1:
        print("%s -> %s" %(mat.name, original))
        
        mat.user_remap(mats[original])
        mats.remove(mat)

Reference

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