Cryptomatte buffers broken with more than 16 enabled passes (Linux only?) #68370
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Reference: blender/blender#68370
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System Information
Operating system: Linux-5.3.12-200.fc30.x86_64-x86_64-with-fedora-30-Thirty 64 Bits
Graphics card: GeForce GTX 970M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.44
Blender Version
Broken: version: 2.83 (sub 0), branch: master, commit date: 2020-01-14 06:12, hash:
1bcb2bfd57Worked: (optional)
Short description of error
Cryptomatte buffers broken with more than 16 enabled passes
Exact steps for others to reproduce the error
Happens with more than 16 passes.
Easiest repro .blend:
T68370_from_scratch.blend
original report:
System Information
Operating system: Linux-5.0.0-23-generic-x86_64-with-debian-buster-sid 64 Bits
Graphics card: GeForce GTX 980 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 430.40
Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash:
f6cb5f5449Worked: (optional)
There is a problem with the cryptomatte of Blender 2.80 downloaded in snapstroe.
I made a blender project named "TEST.blend",When using the BLENDER 2.80 of the snap store to open this project file, the object mask and material mask cannot be used, the asset mask can be used, but it is wrong. So I uninstalled the blender 2.80 downloaded from the snap store and downloaded a Blender 2.80 from the Blender website. When I open my project with this Blender 2.80, I find that the object mask, the material mask can't be read, the asset mask can be read, but it is wrong. Then I switched to the windows system, opened the project with Blender 2.80 and found that cryptomatte works fine.
TEST.blend
Added subscriber: @xqzl
Added subscriber: @dr.sybren
Please explain how to reproduce this issue in detailed steps. There is little we can do with a description like "it's wrong" or "it doesn't work".
I'm also not sure what problem you're describing exactly. The task title mentions the Snap store as being problematic, but the version from the Blender website also had a problem, indicating that it may not be related to the snap store at all.
My English is terrible. I don't know how to describe this problem in words. But I recorded a video and hope that this video will help you understand the problem I described.Cryptomatte-1.m4v
Added subscriber: @iss
Changed status from 'Needs Developer To Reproduce' to: 'Needs User Info'
@xqzl Is this still an issue with latest build? https://builder.blender.org/download/
Also please make sure, that your GPU drivers are up to date.
Changed status from 'Needs User Info' to: 'Archived'
Since last asking for information it has been 7 or more days, due to the policy of our bug tracker we will have to close the report.
Added subscriber: @lichtwerk
Changed status from 'Archived' to: 'Confirmed'
I can confirm the issue (latest buildbot on Linux).
Other Pick Buffers seem to be empty or broken.
Also I am not sure if the only "working" matte 0:39 in the video (AssetID) is actually working. This looks more like the MaterialID to me...
So something mixed up on these buffers access.
Will try to reproduce from scratch.
Also seems to go away if other passes are disabled
#68370.blend
Is this still an issue with latest build? https://builder.blender.org/download/
Also please make sure, that your GPU drivers are up to date.
Ｓorry for the late reply. This problem no longer exists in new versions of blender
Happens with more than 16 passes.
Easiest repro .blend:
T68370_from_scratch.blend
There is a problem with cryptomatte of Blender 2.80 on Linux systemto Cryptomatte buffers broken with more than 16 enabled passes (Linux only?)Added subscriber: @Stefan_Werner
@Stefan_Werner : does this ring a bell?
Removed subscriber: @dr.sybren
Philipp Oeser（lichtwerk），I have tested this project with 2.81a according to your method and it is no problem.
Added subscriber: @Blazej-Floch
Hello,
We had problems with Cryptomatte in production on Linux only. This may also be related to other issues I see around here like: https://developer.blender.org/T67712
The reasons is that std::sort is used and it just happens to be stable on windows, but is unstable in Linux.
Replace with std::stable_sort and all is good.
Else the passes are mixed up, while crypyo matte expects them to be sequential due to the pointer arithmetic it does.
I have a patch that I can supply once I am back to the office.
Cheers,
Blazej
Added subscriber: @brecht
@Blazej-Floch great catch, a patch is definitely welcome.
Today I should have some time to code. I'll try to make some of our patches available.
This issue was referenced by blender/cycles@07f9426ca0
This issue was referenced by
6777956005Added subscriber: @Plyro
Same issue here (before I found the connection to this task I opened a new one, assuming the bug is connected to the light passes)
https://developer.blender.org/T68370
Any solutions/patches available yet? Thanks!
Changed status from 'Confirmed' to: 'Resolved'
@Blazej-Floch: Thx! Did what you said in D7197: Fix #68370: Cryptomatte buffers broken with more than 16 enabled passes (Linux only), seems to work nicely :)
Ah, @brecht was quicker :)