Regression: Compositor render layer node's outputs no longer update when modified from python #114234

New Issue

michael campbell · 2023-10-28T19:40:42+02:00

michael campbell commented

2023-10-28 19:40:42 +02:00

System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 537.58

Blender Version
Broken: version: 4.1.0 Alpha, branch: main, commit date: 2023-10-27 00:53, hash: ce027579e02f
Worked: (previous 4.1.0 build and all builds before that)

Short description of error
Enabling passes of another scene via python no longer results in the current scene's render layers node for that scene getting the new output sockets.

It's strange, but it only appears to be an issue with the Vector pass, other passes that are updated via python get a socket on the render layer node without issue.

Exact steps for others to reproduce the error

open attached blend file ensuring load UI is ticked
go to scripting workspace (top left panel should be a compositor if you used load UI when opening the file)
pay attention to the output sockets on the render layer nodes (neither have vector pass)
run the script
the render layer node that represents the current scene now has the vector output socket, but the render layer node that represents scene.001 has not updated.
on the render layer node that failed to update, click it's scene dropdown and click scene.001 again.
now the output shows, indicating python was successful, but the UI didn't update.

Forcing region redraw with region.tag_redraw() does not resolve.

I've found that I can force the render layer node to update by assigning the same scene back to itself before trying to create links from the missing socket:

bpy.data.scenes[scene_name].node_tree.nodes[n].scene = bpy.data.scenes[scene_name].node_tree.nodes[n].scene

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 537.58 **Blender Version** Broken: version: 4.1.0 Alpha, branch: main, commit date: 2023-10-27 00:53, hash: `ce027579e02f` Worked: (previous 4.1.0 build and all builds before that) **Short description of error** Enabling passes of another scene via python no longer results in the current scene's render layers node for that scene getting the new output sockets. It's strange, but it only appears to be an issue with the Vector pass, other passes that are updated via python get a socket on the render layer node without issue. **Exact steps for others to reproduce the error** 1. open attached blend file ensuring load UI is ticked 2. go to scripting workspace (top left panel should be a compositor if you used load UI when opening the file) 3. pay attention to the output sockets on the render layer nodes (neither have vector pass) 4. run the script 5. the render layer node that represents the current scene now has the vector output socket, but the render layer node that represents scene.001 has not updated. 6. on the render layer node that failed to update, click it's scene dropdown and click scene.001 again. 7. now the output shows, indicating python was successful, but the UI didn't update. Forcing region redraw with region.tag_redraw() does not resolve. I've found that I can force the render layer node to update by assigning the same scene back to itself before trying to create links from the missing socket: ``` bpy.data.scenes[scene_name].node_tree.nodes[n].scene = bpy.data.scenes[scene_name].node_tree.nodes[n].scene ```

updating passes bug.blend

7.1 MiB

michael campbell added the

labels 2023-10-28 19:40:43 +02:00

michael campbell changed title from ~~(URGENT) - Compositor render layer node's outputs no longer update when modified from python~~ to Compositor render layer node's outputs no longer update when modified from python

2023-10-28 19:56:14 +02:00

Iliya Katushenock changed title from ~~Compositor render layer node's outputs no longer update when modified from python~~ to Regression: Compositor render layer node's outputs no longer update when modified from python

2023-10-28 19:59:47 +02:00

Iliya Katushenock added the

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Regression: Compositor render layer node's outputs no longer update when modified from python #114234