material_slots[i].link reverts to 'DATA' after material_slots[i].material = m0 #45695

New Issue

Robert Forsman · 2015-08-05T22:49:23+02:00

Robert Forsman commented

2015-08-05 22:49:23 +02:00

System Information
Linux bubastis 3.18.12-gentoo #1 SMP Tue Jun 16 16:26:19 EDT 2015 x86_64 Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz GenuineIntel GNU/Linux
01:00.0 VGA compatible controller: NVIDIA Corporation GK107GLM [Quadro K1100M] (rev a1)

Blender Version
Broken: 2.74

If I attempt to use python to set a per-object material with code like this:

    obj.material_slots[1].link = 'OBJECT'
    print(obj.material_slots[1].link)
    obj.material_slots[1].material = mat
    print("argh "+obj.material_slots[1].link)

somehow the material_slots- [x].link reverts to 'DATA'

Here is a quick python script you can run while the cube is the active object:

import bpy

obj = bpy.context.active_object

while len(obj.data.materials)<2:
    obj.data.materials.append(None)

obj.material_slots[1].link = 'OBJECT'
obj.material_slots[1].material = bpy.data.materials[0]

print(obj.material_slots[1].link)

Notice how it prints out 'DATA', despite the fact that we set it to 'OBJECT' .

**System Information** Linux bubastis 3.18.12-gentoo #1 SMP Tue Jun 16 16:26:19 EDT 2015 x86_64 Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz GenuineIntel GNU/Linux 01:00.0 VGA compatible controller: NVIDIA Corporation GK107GLM [Quadro K1100M] (rev a1) **Blender Version** Broken: 2.74 If I attempt to use python to set a per-object material with code like this: ``` obj.material_slots[1].link = 'OBJECT' print(obj.material_slots[1].link) obj.material_slots[1].material = mat print("argh "+obj.material_slots[1].link) ``` somehow the material_slots- [x].link reverts to 'DATA' Here is a quick python script you can run while the cube is the active object: ``` import bpy obj = bpy.context.active_object while len(obj.data.materials)<2: obj.data.materials.append(None) obj.material_slots[1].link = 'OBJECT' obj.material_slots[1].material = bpy.data.materials[0] print(obj.material_slots[1].link) ``` Notice how it prints out 'DATA', despite the fact that we set it to 'OBJECT' .

Robert Forsman commented

2015-08-05 22:49:23 +02:00

Changed status to: 'Open'

Robert Forsman commented

2015-08-05 22:49:23 +02:00

Added subscriber: @mutantbob

perfection cat commented

2015-08-06 04:22:03 +02:00

Added subscriber: @sindra1961

perfection cat commented

2015-08-06 04:22:03 +02:00

The script which you showed is wrong.
Did you carry out the script?
I think that an error occurs.
I show a simple example.

import bpy

obj = bpy.data.objects['Cube']

m = bpy.data.materials.new('Material01')
me = obj.data
me.materials.append(m)
obj.material_slots[0].link = 'OBJECT'
obj.material_slots[0].material = m

untitled.blend

The script which you showed is wrong. Did you carry out the script? I think that an error occurs. I show a simple example. ``` import bpy obj = bpy.data.objects['Cube'] m = bpy.data.materials.new('Material01') me = obj.data me.materials.append(m) obj.material_slots[0].link = 'OBJECT' obj.material_slots[0].material = m ``` [untitled.blend](https://archive.blender.org/developer/F220550/untitled.blend)

blender-admin commented

2015-08-06 10:07:44 +02:00

This issue was referenced by be1a684755

This issue was referenced by be1a684755905fd022be5ceecf9a7b2687475793

Campbell Barton commented

2015-08-06 10:12:54 +02:00

Changed status from 'Open' to: 'Resolved'

Campbell Barton closed this issue

2015-08-06 10:12:54 +02:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

material_slots[i].link reverts to 'DATA' after material_slots[i].material = m0 #45695