Cycles: Compositor File Output BW Color Option Issue (again) #101782

New Issue

MC · 2022-10-12T22:42:58+02:00

MC commented

2022-10-12 22:42:58 +02:00

Because somehow, in the previous issue I opened, my comment didn't post at all when I had updated the google drive link.

System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 960M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.59

Blender Version
Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash: 0759f671ce
Working: Unknown

Short description of error
Discovered an issue where a compositor's File Output node is set to BW, it fails to output any emission.

Exact steps for others to reproduce the error
Download this file: https://drive.google.com/file/d/19vkFo1q_K0a_ppQKzBc3_fsRyJAq5Lq_/view?usp=sharing
Load up the following file and render out a single image. Renders out a pure black image.
The result is the same if you use the Emit pass.

Strangely, it works if you put in an RGB to BW node in between, which makes me think the file output is drawing exclusively from the R channel.

Extra Notes
This has several other issues included with it. If preferred, I can make multiple reports to them and link them back here.

The issues in particular:

When rendering out with this file, there will be a brief switch of view layers in the render output to "All" and "Turret Barrel", despite having Render Single Layer turned on.

This seems fixed in 3.6 onwards:
The outliner on the right and below does not show updated view layers that are supposed to be off, despite the animation data being active. Only when you click on some of them (not on the EYE icon, just their names!) will they update appropriately, instead of constantly reflecting the animation data (Animation workspace -> LayerToggles NLA).

Because somehow, in the previous issue I opened, my comment didn't post at all when I had updated the google drive link. **System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 960M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 512.59 **Blender Version** Broken: version: 3.3.0, branch: master, commit date: 2022-09-06 15:39, hash: 0759f671ce Working: Unknown **Short description of error** Discovered an issue where a compositor's File Output node is set to BW, it fails to output any emission. **Exact steps for others to reproduce the error** Download this file: https://drive.google.com/file/d/19vkFo1q_K0a_ppQKzBc3_fsRyJAq5Lq_/view?usp=sharing Load up the following file and render out a single image. Renders out a pure black image. The result is the same if you use the Emit pass. Strangely, it works if you put in an RGB to BW node in between, which makes me think the file output is drawing exclusively from the R channel. **Extra Notes** This has several other issues included with it. If preferred, I can make multiple reports to them and link them back here. The issues in particular: When rendering out with this file, there will be a brief switch of view layers in the render output to "All" and "Turret Barrel", despite having Render Single Layer turned on. This seems fixed in 3.6 onwards: `The outliner on the right and below does not show updated view layers that are supposed to be off, despite the animation data being active. Only when you click on some of them (not on the EYE icon, just their names!) will they update appropriately, instead of constantly reflecting the animation data (Animation workspace -> LayerToggles NLA).`

MC commented

2022-10-12 22:42:58 +02:00

Added subscriber: @MajorCooke

MC commented

2022-10-12 22:43:54 +02:00

This time the materials are included to replicate the problem.

da.buy commented

2022-10-13 01:03:14 +02:00

(Migrated from localhost:3001)

Added subscriber: @da.buy

da.buy commented

2022-10-13 01:03:14 +02:00

(Migrated from localhost:3001)

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

da.buy commented

2022-10-13 01:03:14 +02:00

(Migrated from localhost:3001)

Can confirm, the compositor file output node will only use the red channel for bw render if forced to implicitly convert rgb input.
Here an easier test setup:

comp_file_output_implicit_bw_conversion_bug.blend

Can confirm, the compositor file output node will only use the red channel for bw render if forced to implicitly convert rgb input. Here an easier test setup: [comp_file_output_implicit_bw_conversion_bug.blend](https://archive.blender.org/developer/F13669846/comp_file_output_implicit_bw_conversion_bug.blend)

MC commented

2022-10-13 03:32:04 +02:00

There's a few other additional bugs I noticed which I've included under the "Extra Notes" that may be worth looking into.

Philipp Oeser removed the

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Cycles: Compositor File Output BW Color Option Issue (again) #101782