Automatically change the properties of multiple materials

Question

I'm importing a FBX sequence from Anima Pro with several animated characters but all materials are interpreted as metallic. Every time I import a new fbx I have to manually change hundreds of materials and setting the metallic property to 0.

Is there a way to automatically change the properties of multiple materials on multiple objects?

Can this be done in a script?

score 6 · Accepted Answer · answered Sep 25 '20 at 11:18

Try this. It affects all materials in the file.

import bpy
for mat in bpy.data.materials:
    if not mat.use_nodes:
        mat.metallic = 0
        continue
    for n in mat.node_tree.nodes:
        if n.type == 'BSDF_PRINCIPLED':
            n.inputs["Metallic"].default_value = 0

score 5 · Answer 2 · answered Sep 26 '20 at 09:39

thanks @scurest I managed to apply this only to the selected objects:

import bpy
for obj in bpy.context.selected_objects:
    for mat in obj.data.materials:
        if not mat.use_nodes:
            mat.metallic = 0
            continue
        for n in mat.node_tree.nodes:
            if n.type == 'BSDF_PRINCIPLED':
                n.inputs["Metallic"].default_value = 0

Automatically change the properties of multiple materials

2 Answers2

Linked