Particle System missing on right eye when renderd via terminal #70114

New Issue

Simeon Conzendorf · 2019-09-20T15:05:07+02:00

Simeon Conzendorf commented

2019-09-20 15:05:07 +02:00

System Information
Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.36

Blender Version
Broken: version: 2.81 (sub 12), branch: master, commit date: 2019-09-19 20:35, hash: c8df6f2cf9
I tested also 2.8 and it's also broken.

Short description of error
If you render a stereo image via terminal and use particle system emitter/hair the particle are only visible on one eye (left).

Exact steps for others to reproduce the error

Add a second cube and make it smaller
Add a Particle System to the first cube, as hair, set "render as" to object and choose second cube.
In output properties enable stereoscopy. Set Outputfilename.
Save blendfile and start rendering via terminal, like this on windows:
C:\Users\simeo\Desktop\blender2.8_nightly\blender.exe -b C:\Users\simeo\Desktop\bugreports\stereo_terminal_bug.blend -f 1
Here's my blendfile:
stereo_terminal_bug.blend

Here's a comparison between rendered with and without terminal:

**System Information** Operating system: Windows-10-10.0.18362 64 Bits Graphics card: GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 431.36 **Blender Version** Broken: version: 2.81 (sub 12), branch: master, commit date: 2019-09-19 20:35, hash: `c8df6f2cf9` I tested also 2.8 and it's also broken. **Short description of error** If you render a stereo image via terminal and use particle system emitter/hair the particle are only visible on one eye (left). **Exact steps for others to reproduce the error** - Add a second cube and make it smaller - Add a Particle System to the first cube, as hair, set "render as" to object and choose second cube. - In output properties enable stereoscopy. Set Outputfilename. - Save blendfile and start rendering via terminal, like this on windows: C:\Users\simeo\Desktop\blender2.8_nightly\blender.exe -b C:\Users\simeo\Desktop\bugreports\stereo_terminal_bug.blend -f 1 Here's my blendfile: [stereo_terminal_bug.blend](https://archive.blender.org/developer/F7760782/stereo_terminal_bug.blend) Here's a comparison between rendered with and without terminal: ![stereobug_with_ui.jpg](https://archive.blender.org/developer/F7760784/stereobug_with_ui.jpg)

Simeon Conzendorf commented

2019-09-20 15:05:07 +02:00

Added subscriber: @SimeonConzendorf

blender-admin commented

2019-09-20 15:05:07 +02:00

#70702 was marked as duplicate of this issue

Jacques Lucke commented

2019-09-20 17:41:52 +02:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2019-09-20 17:41:52 +02:00

This issue only seems to affect Cycles, can you confirm that?

Simeon Conzendorf commented

2019-09-20 18:49:40 +02:00

Yes, I can confirm, that it's a bug only in cycles.

Sorin Vinatoru commented

2019-10-03 09:18:42 +02:00

Added subscriber: @sorinv

Dan commented

2019-10-08 00:10:16 +02:00

Added subscriber: @lpug21

Dan commented

2019-10-08 00:10:16 +02:00

I have been able to replicate this while rendering from the command line, but for a few days one of my files was having this issue while also rendering from the GUI.

My scene is complex, and is being rendered out in spherical (equirectangular) stereoscopic format. On cycles, affects both GPU and CPU render.

I have been able to replicate this while rendering from the command line, but for a few days one of my files was having this issue while also rendering from the GUI. My scene is complex, and is being rendered out in spherical (equirectangular) stereoscopic format. On cycles, affects both GPU and CPU render.

Dan commented

2019-10-09 00:38:53 +02:00

For anyone requiring a work-around for this bug, I have been able to successfully render from the terminal by rendering one eye at a time, and manually combining both left and right eyes into one image, after the render is complete.

For anyone requiring a work-around for this bug, I have been able to successfully render from the terminal by rendering one eye at a time, and manually combining both left and right eyes into one image, after the render is complete. ![image.png](https://archive.blender.org/developer/F7797636/image.png)

Simeon Conzendorf commented

2019-10-09 14:38:07 +02:00

Another possible workaround is the operator "make instances real". Execute, then deactivate the particle system. At least for rendering still images it worked for me, before I sent the file to our renderfarm.

Philipp Oeser commented

2019-10-10 15:31:52 +02:00

Added subscribers: @bernardoiraci, @lichtwerk, @grosgood

Seungchan Lee commented

2019-12-06 19:22:18 +01:00

Added subscriber: @seunggs

Seungchan Lee commented

2019-12-06 19:22:18 +01:00

Any update on this?

Oliver Batchelor commented

2020-06-17 11:34:34 +02:00

Added subscriber: @Saulzar

Oliver Batchelor commented

2020-06-17 11:34:34 +02:00

We also have this problem, ran into it using a multi-view render from the terminal. From in the interface the render works fine.

Blender 2.83, Linux

We also have this problem, ran into it using a multi-view render from the terminal. From in the interface the render works fine. Blender 2.83, Linux

Guillaume Payet commented

2020-06-17 11:40:19 +02:00

Added subscriber: @GuillaumePayet

Oliver Batchelor commented

2021-04-20 13:48:15 +02:00

One workaround we have been using is to use emitters instead of hair, perhaps this won't work for many uses of hair but for us it seems enough.

for settings in bpy.data.particles:
  settings.type = "EMITTER"
  settings.frame_start = 0
  settings.frame_end = 3000
  settings.lifetime = 3000
  settings.show_unborn = True
  settings.physics_type = "NO"

One workaround we have been using is to use emitters instead of hair, perhaps this won't work for many uses of hair but for us it seems enough. ``` for settings in bpy.data.particles: settings.type = "EMITTER" settings.frame_start = 0 settings.frame_end = 3000 settings.lifetime = 3000 settings.show_unborn = True settings.physics_type = "NO"

Philipp Oeser removed the

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Particle System missing on right eye when renderd via terminal #70114