Multi-layer EXR renders and saves "combined" output regardless if it's checked on or off in the view layer properties. #108991

New Issue

aulerius · 2023-06-14T23:01:44+02:00

aulerius commented

2023-06-14 23:01:44 +02:00

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 535.98

Blender Version
Broken: version: 3.5.1, branch: blender-v3.5-release, commit date: 2023-04-24 18:11, hash: e1ccd9d4a1d3

Short description of error
When ticked off, the "combined" pass is being rendered and included as a layer when outputting multi-layer EXRs. This applies both to Eevee and Cycles. Expected behavior would be to have it omitted and not processed by the renderer.

More context:
In Cycle's case this introduces a large overhead when the user is not it interested in ray-traced lighting information for example. (personally, I want to export motion vectors, which are only available in cycles)
This is true in the most simple case when "Compositing" is ticked off and there is no node tree, but also introduces further unwanted behavior in the context of compositor. I have a guess that this is related to the fact that "composite" node in the compositor, that follows the "output" settings in Scene settings, is always inherently outputted as a file, as discussed here. In the case of multi-layer EXR, I suppose this "composite" image under the hood is force fed by "combined" layer, ignoring the user's tickmark.
Additionally, if the scene output properties use multi-layer EXR and there are "file output" nodes active in the nodetree with EXR output, it can potentially overwrite files from "file output" in the same folder, despite the user potentially indenting to disable "combined" file output by disconnecting the "composite" node.

Exact steps for others to reproduce the error
In the attached blend file, just hit CTRL+F12 to render animation and inspect the resulting EXR files created in the "export" directory.
The "combined" pass is turned off.

**System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 970/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 535.98 **Blender Version** Broken: version: 3.5.1, branch: blender-v3.5-release, commit date: 2023-04-24 18:11, hash: `e1ccd9d4a1d3` **Short description of error** When ticked off, the "combined" pass is being rendered and included as a layer when outputting multi-layer EXRs. This applies both to Eevee and Cycles. Expected behavior would be to have it omitted and not processed by the renderer. **More context:** In Cycle's case this introduces a large overhead when the user is not it interested in ray-traced lighting information for example. (personally, I want to export motion vectors, which are only available in cycles) This is true in the most simple case when "Compositing" is ticked off and there is no node tree, but also introduces further unwanted behavior in the context of compositor. I have a guess that this is related to the fact that "composite" node in the compositor, that follows the "output" settings in Scene settings, is always inherently outputted as a file, as [discussed here](https://blenderartists.org/t/file-output-node-default-output/664752). In the case of multi-layer EXR, I suppose this "composite" image under the hood is force fed by "combined" layer, ignoring the user's tickmark. Additionally, if the scene output properties use multi-layer EXR and there are "file output" nodes active in the nodetree with EXR output, it can potentially overwrite files from "file output" in the same folder, despite the user potentially indenting to disable "combined" file output by disconnecting the "composite" node. **Exact steps for others to reproduce the error** In the attached blend file, just hit CTRL+F12 to render animation and inspect the resulting EXR files created in the "export" directory. The "combined" pass is turned off.

combined output bug.blend

893 KiB

aulerius added the

labels 2023-06-14 23:01:45 +02:00

Iliya Katushenock added the