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Simulation zone pauses randomly during render (with "Lock Interface" turned ON) #112001

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opened 2023-09-06 03:58:40 +02:00 by Josh Maros · 22 comments
Josh Maros commented 2023-09-06 03:58:40 +02:00
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This bug has an easy workaround, mostly posting this so anyone running into the same issue knows the solution.

Operating system: Linux-5.15.0-79-generic-x86_64-with-glibc2.35 64 Bits, X11 UI
Graphics card: NVIDIA GeForce RTX 3080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 530.30.02

**System Information**
Operating system: Linux-6.7.7-200.fc39.x86_64-x86_64-with-glibc2.38 64 Bits, X11 UI
Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 550.54.14
version: 4.1.0 Beta, branch: blender-v4.1-release, commit date: 2024-03-12 21:34, hash: `6b81fbced817`

**System Information**
Operating system: Linux-6.7.7-200.fc39.x86_64-x86_64-with-glibc2.38 64 Bits, X11 UI
Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 550.54.14
version: 4.2.0 Alpha, branch: main, commit date: 2024-03-14 23:27, hash: `2e6a8ae49c1c`

Broken: version: 3.6.2, branch: blender-v3.6-release, commit date: 2023-08-16 16:43, hash: e53e55951e7a
Worked: N/A, 3.6 is the first version with simulation nodes.

In Eevee, Cycles, and Workbench, rendering an object with a simple simulation zone applied in geometry nodes results in some rendered frames being duplicates of each other, effectively making the simulation pause at random in the final render.

The workaround is to bake the simulation zone result before rendering (see screenshot.)

Check out the attached .blend file for reproduction.

This bug has an easy workaround, mostly posting this so anyone running into the same issue knows the solution. ``` Operating system: Linux-5.15.0-79-generic-x86_64-with-glibc2.35 64 Bits, X11 UI Graphics card: NVIDIA GeForce RTX 3080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 530.30.02 ``` ``` **System Information** Operating system: Linux-6.7.7-200.fc39.x86_64-x86_64-with-glibc2.38 64 Bits, X11 UI Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 550.54.14 version: 4.1.0 Beta, branch: blender-v4.1-release, commit date: 2024-03-12 21:34, hash: `6b81fbced817` ``` ``` **System Information** Operating system: Linux-6.7.7-200.fc39.x86_64-x86_64-with-glibc2.38 64 Bits, X11 UI Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 550.54.14 version: 4.2.0 Alpha, branch: main, commit date: 2024-03-14 23:27, hash: `2e6a8ae49c1c` ``` Broken: version: 3.6.2, branch: blender-v3.6-release, commit date: 2023-08-16 16:43, hash: `e53e55951e7a` Worked: N/A, 3.6 is the first version with simulation nodes. In Eevee, Cycles, and Workbench, rendering an object with a simple simulation zone applied in geometry nodes results in some rendered frames being duplicates of each other, effectively making the simulation pause at random in the final render. The workaround is to bake the simulation zone result before rendering (see screenshot.) Check out the attached .blend file for reproduction.
Screenshot_20230905_185656.png
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Sim Render.blend
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Screenshot_20230905_185656.png
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Iliya Katushenock added this to the 3.6 LTS milestone 2023-09-15 21:58:55 +02:00
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Jacques Lucke commented 2024-03-10 14:16:39 +01:00
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I'm not able to reproduce the issue. Will close this for now. Please reopen if the issue still exists. In that case, please also try to provide an example that doesn't render 5000 frames.

I'm not able to reproduce the issue. Will close this for now. Please reopen if the issue still exists. In that case, please also try to provide an example that doesn't render 5000 frames.
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Josh Maros commented 2024-03-10 17:53:33 +01:00
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This issue still exists on the current release of 4.0:

version: 4.0.2, branch: blender-v4.0-release, commit date: 2023-12-05 07:41, hash: 9be62e85b727, type: release
build date: 2023-12-05, 08:48:50
platform: 'Linux-5.15.0-100-generic-x86_64-with-glibc2.35'

As well as the current beta of 4.1:

version: 4.1.0 Beta, branch: blender-v4.1-release, commit date: 2024-03-09 11:27, hash: 0f1e93e78a85, type: Release
build date: 2024-03-10, 01:39:18
platform: 'Linux-5.15.0-100-generic-x86_64-with-glibc2.35'

See the attached images for examples of identical rendered frames.

This issue still exists on the current release of 4.0: ``` version: 4.0.2, branch: blender-v4.0-release, commit date: 2023-12-05 07:41, hash: 9be62e85b727, type: release build date: 2023-12-05, 08:48:50 platform: 'Linux-5.15.0-100-generic-x86_64-with-glibc2.35' ``` As well as the current beta of 4.1: ``` version: 4.1.0 Beta, branch: blender-v4.1-release, commit date: 2024-03-09 11:27, hash: 0f1e93e78a85, type: Release build date: 2024-03-10, 01:39:18 platform: 'Linux-5.15.0-100-generic-x86_64-with-glibc2.35' ``` See the attached images for examples of identical rendered frames.
0032.png
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0032.png 0031.png 0029.png 0030.png
Josh Maros commented 2024-03-10 17:59:02 +01:00
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I apologize for the long file, it was originally used in a bug report for a rarer issue. I have shortened the render time to 500 frames. I have also attached examples of what frames 250 and 500 should look like. If the simulation is pausing somewhere during the render, these will not match with what is actually rendered.

Since the issue is intermittent, you may have to run the render a couple of times to see it come up. In case this is relevant, I will also note that I am not rendering from the command line, instead using the "render animation" option in the interface.

I apologize for the long file, it was originally used in a bug report for a rarer issue. I have shortened the render time to 500 frames. I have also attached examples of what frames 250 and 500 should look like. If the simulation is pausing somewhere during the render, these will not match with what is actually rendered. Since the issue is intermittent, you may have to run the render a couple of times to see it come up. In case this is relevant, I will also note that I am not rendering from the command line, instead using the "render animation" option in the interface.
Sim Render.blend
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500.png
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250.png
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500.png 250.png
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Gerstmann Bradley commented 2024-03-10 18:44:02 +01:00
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I found the provided files are not reproducing the issue. but I noticed that once you enable "Lock Interface", it will very likely trigger the stop around 20+ frames.
image

I found the provided files are not reproducing the issue. but I noticed that once you enable "Lock Interface", it will very likely trigger the stop around 20+ frames. ![image](/attachments/7804384f-9f01-4898-a496-181983d5c76e)
image.png
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Pratik Borhade commented 2024-03-14 10:20:24 +01:00
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Hi, unable to confirm in current main 09666e149871769b5b77ac8c2a404e3a4ea35f30
Can we know steps used here for replicating the issue to ensure we're on same page? What I did is:

  • Baked the simulation
  • Then rendered the animation
  • Imported render output in VSE to check any frame is incorrectly rendered
Hi, unable to confirm in current main `09666e149871769b5b77ac8c2a404e3a4ea35f30` Can we know steps used here for replicating the issue to ensure we're on same page? What I did is: - Baked the simulation - Then rendered the animation - Imported render output in VSE to check any frame is incorrectly rendered
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Gerstmann Bradley commented 2024-03-14 10:23:13 +01:00
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Hi, unable to confirm in current main 09666e149871769b5b77ac8c2a404e3a4ea35f30
Can we know steps used here for replicating the issue to ensure we're on same page? What I did is:

  • Baked the simulation
  • Then rendered the animation
  • Imported render output in VSE to check any frame is incorrectly rendered

Hi, Baking the simulation is a workaround to solve the problem, where the problem is shown if you do not bake.
In short, Render simulation without a bake + "Lock Interface" will pause the render simulation very quickly. If You do not Lock Interface, it will render to the end without problem.

> Hi, unable to confirm in current main `09666e149871769b5b77ac8c2a404e3a4ea35f30` > Can we know steps used here for replicating the issue to ensure we're on same page? What I did is: > - Baked the simulation > - Then rendered the animation > - Imported render output in VSE to check any frame is incorrectly rendered Hi, Baking the simulation is a workaround to solve the problem, where the problem is shown if you do not bake. In short, Render simulation without a bake + "Lock Interface" will pause the render simulation very quickly. If You do not Lock Interface, it will render to the end without problem.
Pratik Borhade commented 2024-03-14 10:35:18 +01:00
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Thanks. Still not able to replicate though (without baked simulation)

Thanks. Still not able to replicate though (without baked simulation)
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Gerstmann Bradley commented 2024-03-14 10:43:09 +01:00
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Thanks. Still not able to replicate though (without baked simulation)

Have you activate "Lock Interface" as suggested above? I can still reproduce it in the latest main.
4.2.0 Alpha, branch: main, commit date: 2024-03-14 00:20, hash: 09666e149871

> Thanks. Still not able to replicate though (without baked simulation) Have you activate "Lock Interface" as suggested above? I can still reproduce it in the latest main. 4.2.0 Alpha, branch: main, commit date: 2024-03-14 00:20, hash: `09666e149871`
Pratik Borhade commented 2024-03-14 10:44:41 +01:00
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Have you activate "Lock Interface" as suggested above

yes

> Have you activate "Lock Interface" as suggested above yes
Gerstmann Bradley commented 2024-03-14 10:53:35 +01:00
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hmm, that's weird. It's so easy to replicate on my end.
Here's a recreated file, everything is already set. People should just render animation brainlessly to check if the problem exist.
People should find that in the viewport the cube is rotating. but in the render cube is not driven by the simulation.

hmm, that's weird. It's so easy to replicate on my end. Here's a recreated file, everything is already set. People should just render animation brainlessly to check if the problem exist. People should find that in the viewport the cube is rotating. but in the render cube is not driven by the simulation.
Replica.blend
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Raimund Klink commented 2024-03-14 11:23:39 +01:00
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So to reproduce just "Render Animation"? The cube isn't moving at all
I can confirm with Blender 4.2 from today on Windows 11

So to reproduce just "Render Animation"? The cube isn't moving at all I can confirm with Blender 4.2 from today on Windows 11
Gerstmann Bradley commented 2024-03-14 11:25:26 +01:00
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So to reproduce just "Render Animation"? The cube isn't moving at all
Blender 4.2 from today

Yes, that's exactly the problem discussed here. If you play the animation in the viewport, you can see the cube is rotating due to simulation nodes. So you can confirm the issue as us.

> So to reproduce just "Render Animation"? The cube isn't moving at all > Blender 4.2 from today > Yes, that's exactly the problem discussed here. If you play the animation in the viewport, you can see the cube is rotating due to simulation nodes. So you can confirm the issue as us.
Raimund Klink commented 2024-03-14 11:31:34 +01:00
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"Lock Interface" prevents the simulation node from working.

"Lock Interface" prevents the simulation node from working.
Gerstmann Bradley commented 2024-03-14 11:49:26 +01:00
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hmmm, for comparison I tested how other blender simulation behaves.
It seems cloth simulation can work without a bake in Lock Interface,
but Rigid body and softbody will stop as well.

Perhaps this is a known issue, but I am still not sure.

hmmm, for comparison I tested how other blender simulation behaves. It seems cloth simulation can work without a bake in Lock Interface, but Rigid body and softbody will stop as well. Perhaps this is a known issue, but I am still not sure.
Pratik Borhade commented 2024-03-15 04:43:00 +01:00
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Hmm, still not able to confirm (even in Replica.blend) :/

Hmm, still not able to confirm (even in `Replica.blend`) :/
Pratik Borhade commented 2024-03-15 04:45:56 +01:00
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but Rigid body and softbody will stop as well.

#99700

> but Rigid body and softbody will stop as well. #99700
Raimund Klink commented 2024-03-15 09:27:13 +01:00
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Funny, I don't even remember writing that report :)

Funny, I don't even remember writing that report :)
Gerstmann Bradley commented 2024-03-15 09:29:35 +01:00
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I can only say that I am on windows, nothing more.

Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 531.61

I can only say that I am on windows, nothing more. Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 2060/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 531.61
Pratik Borhade commented 2024-03-15 09:32:52 +01:00
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I'll ask in triaging channel for help.
I'm on windows as well:

**System Information**
Operating system: Windows-10-10.0.22631-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3050 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 551.76
I'll ask in triaging channel for help. I'm on windows as well: ``` **System Information** Operating system: Windows-10-10.0.22631-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3050 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 551.76 ```
Raimund Klink commented 2024-03-15 09:45:42 +01:00
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Maybe it is reproducible for you in background mode :)
blender -b Replica_Ray.blend -a
The animation doesn't move as it should.

Unrelated to this bug: Shouldn't Blender print a message where it saved the .mkv file??

Maybe it is reproducible for you in background mode :) ```blender -b Replica_Ray.blend -a``` The animation doesn't move as it should. Unrelated to this bug: Shouldn't Blender print a message where it saved the .mkv file??
Replica_Ray.blend
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Pratik Borhade commented 2024-03-15 11:11:56 +01:00
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Nope, can't confirm in background mode either :/

Nope, can't confirm in background mode either :/
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Philipp Oeser commented 2024-03-15 12:02:18 +01:00
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I can confirm

**System Information**
Operating system: Linux-6.7.7-200.fc39.x86_64-x86_64-with-glibc2.38 64 Bits, X11 UI
Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 550.54.14
version: 4.1.0 Beta, branch: blender-v4.1-release, commit date: 2024-03-12 21:34, hash: `6b81fbced817`

**System Information**
Operating system: Linux-6.7.7-200.fc39.x86_64-x86_64-with-glibc2.38 64 Bits, X11 UI
Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 550.54.14
version: 4.2.0 Alpha, branch: main, commit date: 2024-03-14 23:27, hash: `2e6a8ae49c1c`
I can confirm ``` **System Information** Operating system: Linux-6.7.7-200.fc39.x86_64-x86_64-with-glibc2.38 64 Bits, X11 UI Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 550.54.14 version: 4.1.0 Beta, branch: blender-v4.1-release, commit date: 2024-03-12 21:34, hash: `6b81fbced817` ``` ``` **System Information** Operating system: Linux-6.7.7-200.fc39.x86_64-x86_64-with-glibc2.38 64 Bits, X11 UI Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 550.54.14 version: 4.2.0 Alpha, branch: main, commit date: 2024-03-14 23:27, hash: `2e6a8ae49c1c` ```
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Philipp Oeser changed title from Simulation zone pauses randomly during render to Simulation zone pauses randomly during render (with "Lock Interface" turned ON) 2024-03-15 12:03:51 +01:00
Philipp Oeser removed this from the 3.6 LTS milestone 2024-03-15 12:05:10 +01:00
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