material remapping work properly only the first time #48740

New Issue

mathieu menuet · 2016-06-26T12:12:41+02:00

mathieu menuet commented

2016-06-26 12:12:41 +02:00

System Information
Win 7 x64

Blender Version
Broken: 2a69b09

Short description of error
Remapping an object's material work the first time, but switching back to original one won't work. It may change other object's material by the way.

Exact steps for others to reproduce the error
red.blend
green.blend
Download both files in one directory. Open green.blend and remap red material (linked) in outliner to green material. Red object becomes green, correct.
Now remap again this material to green, nothing happens. Sometime, the green object becomes red, but the red object will stay green forever.

**System Information** Win 7 x64 **Blender Version** Broken: 2a69b09 **Short description of error** Remapping an object's material work the first time, but switching back to original one won't work. It may change other object's material by the way. **Exact steps for others to reproduce the error** [red.blend](https://archive.blender.org/developer/F318698/red.blend) [green.blend](https://archive.blender.org/developer/F318699/green.blend) Download both files in one directory. Open green.blend and remap red material (linked) in outliner to green material. Red object becomes green, correct. Now remap again this material to green, nothing happens. Sometime, the green object becomes red, but the red object will stay green forever.

mathieu menuet commented

2016-06-26 12:12:41 +02:00

Changed status to: 'Open'

mathieu menuet commented

2016-06-26 12:12:41 +02:00

Added subscriber: @bliblubli

mathieu menuet commented

2016-06-26 12:17:03 +02:00

Trying to solve the problem with undo (instead of remapping again the other way) creates a lot of users (18 in my case) and make the object black without any material.

Bastien Montagne commented

2016-06-26 12:49:30 +02:00

Added subscriber: @mont29

Bastien Montagne self-assigned this 2016-06-26 12:49:30 +02:00

Bastien Montagne commented

2016-06-26 12:49:30 +02:00

Hrrrmmm… remapping linked data… not even sure I checked that use case! :P

Bastien Montagne commented

2016-06-26 12:55:42 +02:00

Yeah, this should not be allowed, you cannot remap linked data usages that way, it's calling for problems (linked data is assumed 'frozen' and non-editable). Will add checks in code to prevent this to happen!

mathieu menuet commented

2016-06-26 20:16:20 +02:00

It's one solution. Maybe a better one for user would be to ask if he wants to edit the original file. Then changes could be saved to original data. Now that you have implemented a way to save specific datablocks to another .blend in the API, it should be doable?

Bastien Montagne commented

2016-06-26 22:32:30 +02:00

Would rather not do that - at all. Would make library handling even more complicated (and believe me, it’s already rather hairy code).

Library editing should be featured separately, as an addon e.g., which would simply launch another blender session with relevant library file etc.

Would rather not do that - at all. Would make library handling even more complicated (and believe me, it’s already rather hairy code). Library editing should be featured separately, as an addon e.g., which would simply launch another blender session with relevant library file etc.

blender-admin commented

2016-06-27 15:46:43 +02:00

This issue was referenced by e2c7ee7733

This issue was referenced by e2c7ee773311734450a229051673fbfea61b641a

Bastien Montagne commented

2016-06-27 15:49:05 +02:00

Changed status from 'Open' to: 'Resolved'

Bastien Montagne closed this issue

2016-06-27 15:49:05 +02:00

mathieu menuet commented

2016-06-27 20:36:29 +02:00

Thanks for the fix. Problem with addons is that they are most of the time not so well maintained/programmed on the long run. They also tend to become slow when managing big amount of datas. And I'm pretty sure we will arrive to 3-4 addons doing the same job, none of them being fully featured
Trying to implement a custom addon as you said, I used the new operator to write datablock to an external .blend. It seems to erase everything else, to only keep the saved datablock. Am I doing something wrong or are you going to add the possibility to append later?
Regards

Thanks for the fix. Problem with addons is that they are most of the time not so well maintained/programmed on the long run. They also tend to become slow when managing big amount of datas. And I'm pretty sure we will arrive to 3-4 addons doing the same job, none of them being fully featured Trying to implement a custom addon as you said, I used the new operator to write datablock to an external .blend. It seems to erase everything else, to only keep the saved datablock. Am I doing something wrong or are you going to add the possibility to append later? Regards

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material remapping work properly only the first time #48740