Blender 3.2.1 - Particles - Particles generate differently on Linux vs Windows #100369

New Issue

Carlo Andreacchio · 2022-08-12T10:31:13+02:00

Carlo Andreacchio commented

2022-08-12 10:31:13 +02:00

System Information
Operating system: Linux-5.4.0-122-generic-x86_64-with-glibc2.31 64 Bits - Windows 10 x64
Graphics card: NVIDIA GeForce GTX 1080 - NVIDIA RTX 3080

Blender Version
Broken: version: 3.2.1, branch: master, commit date: 2022-07-05 15:44, hash: a2d59b2dac
Worked: 2.7.9

Short description of error
Particles render differently between windows and linux.
Linux:

Windows and MacOS:

Exact steps for others to reproduce the error

particleTest_v001.blend

Open attached blend file on a Linux machine
press f12
save image to network drive
open attached blend file on a windows machine
press f12
open the image from the network drive in another window
press alt tab to flick between them and see that the particles generate differently.

**System Information** Operating system: Linux-5.4.0-122-generic-x86_64-with-glibc2.31 64 Bits - Windows 10 x64 Graphics card: NVIDIA GeForce GTX 1080 - NVIDIA RTX 3080 **Blender Version** Broken: version: 3.2.1, branch: master, commit date: 2022-07-05 15:44, hash: a2d59b2dac Worked: 2.7.9 **Short description of error** Particles render differently between windows and linux. Linux: ![particles_linux.png](https://archive.blender.org/developer/F13369321/particles_linux.png) Windows and MacOS: ![particles_windows.png](https://archive.blender.org/developer/F13369326/particles_windows.png) **Exact steps for others to reproduce the error** [particleTest_v001.blend](https://archive.blender.org/developer/F13369328/particleTest_v001.blend) 1. Open attached blend file on a Linux machine 2. press f12 3. save image to network drive 4. open attached blend file on a windows machine 5. press f12 6. open the image from the network drive in another window 7. press alt tab to flick between them and see that the particles generate differently.

Carlo Andreacchio commented

2022-08-12 10:31:13 +02:00

Added subscriber: @candreacchio

Carlo Andreacchio commented

2022-08-15 00:05:04 +02:00

Confirmed the bug to still be present in 3.4 Alpha - b5e92c3dfe

Confirmed the bug to still be present in 3.4 Alpha - b5e92c3dfe

Omar Emara commented

2022-08-15 12:59:34 +02:00

Added subscriber: @OmarEmaraDev

Omar Emara commented

2022-08-15 12:59:34 +02:00

Rendering the attach file on Linux produces the Linux image in the report, so I will wait until someone on Windows can reproduce the Window image on Windows.
But meanwhile, you say that it is consistent in older versions like 2.79, is that correct? Which image of them does the older version produce?

Rendering the attach file on Linux produces the Linux image in the report, so I will wait until someone on Windows can reproduce the Window image on Windows. But meanwhile, you say that it is consistent in older versions like 2.79, is that correct? Which image of them does the older version produce?

Germano Cavalcante commented

2022-08-15 20:52:51 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-08-15 20:52:51 +02:00

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

Germano Cavalcante commented

2022-08-15 20:52:51 +02:00

I tested it here on Windows. The result matches the Windows image in the report.
I also adapted the file for Blender 2.79:
particleTest_279.blend

The result is the same there.
I couldn't check if it's a regression.

System Information
Operating system: Windows-10-10.0.22000 64 Bits
Graphics card: Radeon (TM) RX 480 Graphics ATI Technologies Inc. 4.5.0 Core Profile Context 22.7.1.220725

I tested it here on Windows. The result matches the Windows image in the report. I also adapted the file for Blender 2.79: [particleTest_279.blend](https://archive.blender.org/developer/F13389205/particleTest_279.blend) The result is the same there. I couldn't check if it's a regression. --- **System Information** Operating system: Windows-10-10.0.22000 64 Bits Graphics card: Radeon (TM) RX 480 Graphics ATI Technologies Inc. 4.5.0 Core Profile Context 22.7.1.220725

Carlo Andreacchio commented

2022-08-16 00:05:02 +02:00

I just tested both windows and linux on 2.79 (cac3e16cfb) (this a build that we have been using, from after 2.79 was released during 2.8 production), and they were the same as each other, but different results to both results in 3.4

I just tested both windows and linux on 2.79 (cac3e16cfb) (this a build that we have been using, from after 2.79 was released during 2.8 production), and they were the same as each other, but different results to both results in 3.4 ![untitled.png](https://archive.blender.org/developer/F13389673/untitled.png)

Carlo Andreacchio commented

2022-09-01 00:32:06 +02:00

Will this be fixed for the 3.3 release?

Omar Emara commented

2022-09-01 09:07:38 +02:00

@candreacchio That would unlikely since 3.3 is already preparing for release.

Carlo Andreacchio commented

2022-09-01 09:10:09 +02:00

Yes, critical fixes only. And this is a critical issue. How are artists supposed to have confidence in their renders if what they are generating may be incorrect.

Especially in small - medium sized VFX houses, where linux machines are more used for rendering, and windows machines are used more for the artists.

Yes, critical fixes only. And this is a critical issue. How are artists supposed to have confidence in their renders if what they are generating may be incorrect. Especially in small - medium sized VFX houses, where linux machines are more used for rendering, and windows machines are used more for the artists.

Omar Emara commented

2022-09-01 09:13:24 +02:00

The problem is that the particle system is end of life and is not actively maintained. Maybe using Geometry Nodes for some of those tasks is a better option for now.

Carlo Andreacchio commented

2022-09-01 09:14:21 +02:00

Yes, but it is still part of this release and even so, it is a critical issue for LTS releases and needs to be maintained.

Carlo Andreacchio commented

2022-09-01 09:55:57 +02:00

Confirmed that this is in the LTS release of 2.93 as well.

It is a critical issue. It should be treated as one, even if it will eventually get deprecated, right now it is not deprecated so it should be treated as such.

Confirmed that this is in the LTS release of 2.93 as well. It is a critical issue. It should be treated as one, even if it will eventually get deprecated, right now it is not deprecated so it should be treated as such.

Carlo Andreacchio commented

2022-10-05 02:12:37 +02:00

Will this be fixed for the LTS of 2.93, 3.3 and the 3.4 release?

Carlo Andreacchio commented

2022-10-17 23:12:49 +02:00

With the latest comments about "LTS releases should be done once a month, even if there is just one (high priority) bugfix", it would be great to get this fixed for the next release, as this is a significant issue for those running multi-platform render farms.

Carlo Andreacchio commented

2022-11-03 05:13:51 +01:00

Any chance that this will get fixed relatively soonish?

Philipp Oeser removed the

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Blender 3.2.1 - Particles - Particles generate differently on Linux vs Windows #100369