Compositor: Scenes are being set to no users after doing a full copy. #97709

New Issue

michael campbell · 2022-04-29T17:26:08+02:00

michael campbell commented

2022-04-29 17:26:08 +02:00

System Information
Operating system: Windows-10-10.0.19042-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 472.12

Blender Version
Broken: version: 3.2.0 Alpha, branch: master, commit date: 2022-04-13 23:49, hash: 0ba061c3bc
Worked: (newest version of Blender that worked as expected)

Short Description
In compositor, if there is no render layers node or removing scene from render layers node and making full copy of scene will result zero users for the original scene
Extremely problematic as I just lost several hours of work after saving and reopening a file.

steps to reproduce

open blender
go to the compositor tab and click use nodes (node network will be created)
Remove scene from Render layers node
make a full copy:

{F13038215}

Your original scene will now show 0 users and will be lost on resave.

{F13038219}

Doesn't matter if there's geometry, cameras etc, it'll still show 0 users.

When doing the full copy, the new copy has 2 users, and the original now has 0 users:

**System Information** Operating system: Windows-10-10.0.19042-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 472.12 **Blender Version** Broken: version: 3.2.0 Alpha, branch: master, commit date: 2022-04-13 23:49, hash: `0ba061c3bc` Worked: (newest version of Blender that worked as expected) **Short Description** In compositor, if there is no render layers node or removing scene from render layers node and making full copy of scene will result zero users for the original scene Extremely problematic as I just lost several hours of work after saving and reopening a file. **steps to reproduce** - open blender - go to the compositor tab and click use nodes (node network will be created) - Remove scene from Render layers node - make a full copy: ``` {F13038215} ``` # Your original scene will now show 0 users and will be lost on resave. ``` {F13038219} ``` Doesn't matter if there's geometry, cameras etc, it'll still show 0 users. When doing the full copy, the new copy has 2 users, and the original now has 0 users: ![image.png](https://archive.blender.org/developer/F13038228/image.png)

michael campbell commented

2022-04-29 17:26:08 +02:00

Added subscriber: @3di

Germano Cavalcante commented

2022-04-29 21:40:12 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-04-29 21:40:12 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Germano Cavalcante commented

2022-04-29 21:40:12 +02:00

Thanks for the report, but I can't reproduce the problem, Scene always has at least 1 User here.
Are you sure the steps describing the problem are complete?

Thanks for the report, but I can't reproduce the problem, Scene always has at least 1 User here. Are you sure the steps describing the problem are complete?

michael campbell commented

2022-04-29 22:03:54 +02:00

Hi Germano. Perhaps it's related to the file originally being created in an earlier version of Blender. I've attached a cut down version of the file. open the 'comp master' scene and then choose the full copy option. A zero should appear next to the original 'comp master' indicating it has no users and will be deleted on file open.

scene issue.blend

Hi Germano. Perhaps it's related to the file originally being created in an earlier version of Blender. I've attached a cut down version of the file. open the 'comp master' scene and then choose the full copy option. A zero should appear next to the original 'comp master' indicating it has no users and will be deleted on file open. [scene issue.blend](https://archive.blender.org/developer/F13039001/scene_issue.blend)

michael campbell commented

2022-04-29 22:04:46 +02:00

here's what mine looks like after choosing the full copy option:

full copy option:

here's what mine looks like after choosing the full copy option: ![image.png](https://archive.blender.org/developer/F13039005/image.png) full copy option: ![image.png](https://archive.blender.org/developer/F13039009/image.png)

michael campbell commented

2022-04-29 22:11:20 +02:00

and if the original is marked as fake user, then the copy gets a fake user, but the original loses it's fake user and shows 0 users instead. Below I did a full copy of 'Comp cam 2':

and if the original is marked as fake user, then the copy gets a fake user, but the original loses it's fake user and shows 0 users instead. Below I did a full copy of 'Comp cam 2': ![image.png](https://archive.blender.org/developer/F13039028/image.png)

Germano Cavalcante commented

2022-04-29 22:59:06 +02:00

Changed status from 'Needs User Info' to: 'Needs Triage'

Pratik Borhade commented

2022-04-30 13:25:32 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-04-30 13:45:28 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Pratik Borhade commented

2022-04-30 13:45:28 +02:00

I can reproduce this from scratch when no scene is selected in render layers node.
@mano-wii , does this also fall under #core module?

I can reproduce this from scratch when no scene is selected in render layers node. @mano-wii , does this also fall under #core module?

Pratik Borhade changed title from ~~Scenes are being set to no users after doing a full copy of another scene. Results in loss of work when re-opening blend files.~~ to Compositor: Scenes are being set to no users after doing a full copy of another scene

2022-04-30 13:51:01 +02:00

michael campbell changed title from ~~Compositor: Scenes are being set to no users after doing a full copy of another scene~~ to Compositor: Scenes are being set to no users after doing a full copy.

2022-04-30 13:58:15 +02:00

Philipp Oeser commented

2022-05-04 15:06:12 +02:00

Added subscribers: @mont29, @lichtwerk

Philipp Oeser commented

2022-05-04 15:06:12 +02:00

Yep, this should be #core also.

@mont29: hm, it has always been like that but this does not look like a nice thing to do. this way you'll loose the compositing nodetree on save and load...
note if you do this without step (4.), the scene we be reinforced into the renderlayers node upon save and reload.

Yep, this should be #core also. @mont29: hm, it has always been like that but this does not look like a nice thing to do. this way you'll loose the compositing nodetree on save and load... note if you do this without step (4.), the scene we be reinforced into the renderlayers node upon save and reload.

blender-admin commented

2022-05-04 17:05:12 +02:00

This issue was referenced by 60772baebf

This issue was referenced by 60772baebf6cf4bb54bc7d04a758c78d639062cf

Bastien Montagne commented

2022-05-04 17:30:01 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Bastien Montagne closed this issue

2022-05-04 17:30:01 +02:00

Bastien Montagne self-assigned this 2022-05-04 17:30:01 +02:00

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Compositor: Scenes are being set to no users after doing a full copy. #97709

Your original scene will now show 0 users and will be lost on resave.