"Passes" disappear in "Render Layers" node in compositor #94812

New Issue

Marcin Twarowski · 2022-01-11T12:01:02+01:00

Marcin Twarowski commented

2022-01-11 12:01:02 +01:00

System Information
Operating system: Windows-10-10.0.19043-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 497.29

Blender Version
Broken: version: 3.1.0 Alpha, branch: master, commit date: 2022-01-10 22:45, hash: 922ae55a16
Worked: 3.0

Short description of error
I connected Render Layer to Alpha Over node in compositor:

After reopening of the file, "Passes" (Image, Alpha) of that node are not there:

Exact steps for others to reproduce the error

Open attached file
compositor_bug.blend
Notice that Passes are missing.
Pick a scene from the dropdown menu.
Passes are back.

**System Information** Operating system: Windows-10-10.0.19043-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 497.29 **Blender Version** Broken: version: 3.1.0 Alpha, branch: master, commit date: 2022-01-10 22:45, hash: `922ae55a16` Worked: 3.0 **Short description of error** I connected Render Layer to Alpha Over node in compositor: ![obraz.png](https://archive.blender.org/developer/F12800760/obraz.png) After reopening of the file, "Passes" (Image, Alpha) of that node are not there: ![obraz.png](https://archive.blender.org/developer/F12800762/obraz.png) **Exact steps for others to reproduce the error** - Open attached file [compositor_bug.blend](https://archive.blender.org/developer/F12800764/compositor_bug.blend) - Notice that Passes are missing. - Pick a scene from the dropdown menu. ![obraz.png](https://archive.blender.org/developer/F12800765/obraz.png) - Passes are back.

Marcin Twarowski commented

2022-01-11 12:01:02 +01:00

Added subscriber: @MarcinTwarowski

blender-admin commented

2022-01-11 12:01:02 +01:00

#94480 was marked as duplicate of this issue

Pratik Borhade commented

2022-01-11 12:23:29 +01:00

Added subscriber: @PratikPB2123

Jacques Lucke commented

2022-01-11 13:12:40 +01:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2022-01-11 13:12:40 +01:00

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

Jacques Lucke commented

2022-01-11 13:12:40 +01:00

Looking into this, I found three issues (the first of which seems to be the main problem here):

cmp_node_rlayer_create_outputs_cb is using G_MAIN, but that is not set correctly yet when the file is not done loading yet.
The render layer node makes very unconventional use of node->storage. It only allocates node->storage while the node is being updated.
It seems like cmp_node_rlayers_update could update other nodes as well. Or at least it iterates over all compositor node trees in cmp_node_rlayer_create_outputs_cb.

Looking into this, I found three issues (the first of which seems to be the main problem here): * `cmp_node_rlayer_create_outputs_cb` is using `G_MAIN`, but that is not set correctly yet when the file is not done loading yet. * The render layer node makes very unconventional use of `node->storage`. It only allocates `node->storage` while the node is being updated. * It seems like `cmp_node_rlayers_update` could update other nodes as well. Or at least it iterates over all compositor node trees in `cmp_node_rlayer_create_outputs_cb`.

blender-admin commented

2022-01-12 11:07:31 +01:00

This issue was referenced by 145f1d1e0a

This issue was referenced by 145f1d1e0a59c1de311a0511e05541563296d879

Jacques Lucke commented

2022-01-12 11:08:45 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Jacques Lucke closed this issue

2022-01-12 11:08:45 +01:00

Jacques Lucke self-assigned this 2022-01-12 11:08:45 +01:00

Dalai Felinto commented

2022-05-16 17:04:37 +02:00

Added subscribers: @Alaska, @dfelinto

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"Passes" disappear in "Render Layers" node in compositor #94812