Safe Buffers checkbox disables cryptomatte metadata #84539

New Issue

Lukas Wieg · 2021-01-08T20:56:46+01:00

Lukas Wieg commented

2021-01-08 20:56:46 +01:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: GeForce RTX 3070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.79

Blender Version
Broken: version: 2.92.0 Alpha, branch: master, commit date: 2021-01-07 22:28, hash: 61f1faac3f
Also Broken: version 2.83 LTS (We found this bug today at work)

Short description of error
If the "safe buffers" checkbox (in the render>performance>final render tab) is checked, blender doesn't write/create the metadata for the cryptomatte. This is especially important if blender is used in a compositing pipeline with nuke or fusion.

Exact steps for others to reproduce the error

Open a new Blender file
Check any cryptomatte option in the Output Properties (I used "Object")
Navigate in the Property Panel to Render Properties > Performance >Final Render
Check Save Buffers
Render the scene
In the image editor of the rendered image press "n" or open the side panel
Navigate to Image > Metadata

There will be only the metadata information from Output Properties> Metadata
But the cycles metadata and especially the metadata for the cryptomatte are missing.

Here is an example of the metadata:
with Safe Buffers:

whitout Safe Buffers (these metadata are important):

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: GeForce RTX 3070/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.79 **Blender Version** Broken: version: 2.92.0 Alpha, branch: master, commit date: 2021-01-07 22:28, hash: `61f1faac3f` Also Broken: version 2.83 LTS (We found this bug today at work) **Short description of error** If the "safe buffers" checkbox (in the render>performance>final render tab) is checked, blender doesn't write/create the metadata for the cryptomatte. This is especially important if blender is used in a compositing pipeline with nuke or fusion. **Exact steps for others to reproduce the error** 1. Open a new Blender file 2. Check any cryptomatte option in the *Output Properties* (I used "Object") 3. Navigate in the *Property Panel* to *Render Properties > Performance >Final Render* 4. Check *Save Buffers* 5. Render the scene 6. In the image editor of the rendered image press "n" or open the side panel 7. Navigate to *Image > Metadata* There will be only the metadata information from *Output Properties> Metadata* But the cycles metadata and especially the metadata for the cryptomatte are missing. Here is an example of the metadata: with *Safe Buffers*: ![image.png](https://archive.blender.org/developer/F9556408/image.png) whitout *Safe Buffers* (these metadata are important): ![image.png](https://archive.blender.org/developer/F9556414/image.png)

Lukas Wieg commented

2021-01-08 20:56:46 +01:00

Added subscriber: @LukasWieg