realize instances node will cause problems with motion blur #92958

New Issue

Behe eddine · 2021-11-09T13:22:19+01:00

Behe eddine commented

2021-11-09 13:22:19 +01:00

System Information
Operating system: Windows-10-10.0.22000-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1650 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 472.39

Blender Version
Broken: version: 3.0.0 Beta, branch: master, commit date: 2021-11-08 15:56, hash: ab7214ca2e

Short description of error
these are some examples:
eevee+ motion blur:

** this motion blur doesn't look right

cycles + realize node + motion blur:

cycles+ motion blur:

Exact steps for others to reproduce the error

Open this file:
geometry nodes.blend
enable disable: the second modifier named "just release instances"
you can check the node tree there is only one node in this modifier
and switch between render engines
you'll notice the problem
disable or disable motion blu of course
BTW it works without motion blur for all the examples above

that's all thanks for your work

**System Information** Operating system: Windows-10-10.0.22000-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1650 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 472.39 **Blender Version** Broken: version: 3.0.0 Beta, branch: master, commit date: 2021-11-08 15:56, hash: `ab7214ca2e` **Short description of error** these are some examples: eevee+ motion blur: ![eevee motion blur enabled -- realse instances.png](https://archive.blender.org/developer/F11774541/eevee_motion_blur_enabled_--_realse_instances.png) ** this motion blur doesn't look right cycles + realize node + motion blur: ![cycles motion blur enabled + realse instances.png](https://archive.blender.org/developer/F11774548/cycles_motion_blur_enabled___realse_instances.png) cycles+ motion blur: ![cycles motion blur enabled -- realse instances.png](https://archive.blender.org/developer/F11774554/cycles_motion_blur_enabled_--_realse_instances.png) **Exact steps for others to reproduce the error** Open this file: [geometry nodes.blend](https://archive.blender.org/developer/F11774566/geometry_nodes.blend) enable disable: the second modifier named "just release instances" you can check the node tree there is only one node in this modifier and switch between render engines you'll notice the problem disable or disable motion blu of course BTW it works without motion blur for all the examples above that's all thanks for your work

Behe eddine commented

2021-11-09 13:22:19 +01:00

Added subscriber: @BEHE

Behe eddine commented

2021-11-09 14:46:52 +01:00

I tried the file in the latest build of blender I mean blender 3.1 and no difference is noticed

Pratik Borhade commented

2021-11-10 07:13:04 +01:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-11-10 07:13:04 +01:00

when I disable enable the realize instance node in the node tree it causes crash

Thanks for the report. I can confirm the crash but I think this is same as: #92682 (Eevee Motion Blur crash)

blender.exe         :0x00007FF6A6CFEAF0  mesh_batch_cache_request_surface_batches
blender.exe         :0x00007FF6A6CFDD10  DRW_mesh_batch_cache_pos_vertbuf_get
blender.exe         :0x00007FF6A6D120A0  EEVEE_motion_blur_cache_populate
blender.exe         :0x00007FF6A6CD98F0  EEVEE_materials_cache_populate
blender.exe         :0x00007FF6A6CE3C80  EEVEE_render_cache
blender.exe         :0x00007FF6A6CCE740  DRW_render_object_iter
blender.exe         :0x00007FF6A6CE60C0  eevee_render_to_image
blender.exe         :0x00007FF6A6CCE9A0  DRW_render_to_image
blender.exe         :0x00007FF6AB680170  engine_render_view_layer
blender.exe         :0x00007FF6AB67F7E0  RE_engine_render
blender.exe         :0x00007FF6AB688DE0  do_render_engine
blender.exe         :0x00007FF6AB688870  do_render_compositor
blender.exe         :0x00007FF6AB688E50  do_render_full_pipeline
blender.exe         :0x00007FF6AB6860E0  RE_RenderFrame
blender.exe         :0x00007FF6A7A98D60  render_startjob
blender.exe         :0x00007FF6A6BD7A20  do_job_thread
blender.exe         :0x00007FF6ABE18E70  _ptw32_threadStart
ucrtbase.dll        :0x00007FF88DF71B20  configthreadlocale
KERNEL32.DLL        :0x00007FF88FEC7020  BaseThreadInitThunk
ntdll.dll           :0x00007FF8900A2630  RtlUserThreadStart```

> when I disable enable the realize instance node in the node tree it causes crash Thanks for the report. I can confirm the crash but I think this is same as: #92682 (Eevee Motion Blur crash) ```lines blender.exe :0x00007FF6A6CFEAF0 mesh_batch_cache_request_surface_batches blender.exe :0x00007FF6A6CFDD10 DRW_mesh_batch_cache_pos_vertbuf_get blender.exe :0x00007FF6A6D120A0 EEVEE_motion_blur_cache_populate blender.exe :0x00007FF6A6CD98F0 EEVEE_materials_cache_populate blender.exe :0x00007FF6A6CE3C80 EEVEE_render_cache blender.exe :0x00007FF6A6CCE740 DRW_render_object_iter blender.exe :0x00007FF6A6CE60C0 eevee_render_to_image blender.exe :0x00007FF6A6CCE9A0 DRW_render_to_image blender.exe :0x00007FF6AB680170 engine_render_view_layer blender.exe :0x00007FF6AB67F7E0 RE_engine_render blender.exe :0x00007FF6AB688DE0 do_render_engine blender.exe :0x00007FF6AB688870 do_render_compositor blender.exe :0x00007FF6AB688E50 do_render_full_pipeline blender.exe :0x00007FF6AB6860E0 RE_RenderFrame blender.exe :0x00007FF6A7A98D60 render_startjob blender.exe :0x00007FF6A6BD7A20 do_job_thread blender.exe :0x00007FF6ABE18E70 _ptw32_threadStart ucrtbase.dll :0x00007FF88DF71B20 configthreadlocale KERNEL32.DLL :0x00007FF88FEC7020 BaseThreadInitThunk ntdll.dll :0x00007FF8900A2630 RtlUserThreadStart```

Behe eddine commented

2021-11-10 07:32:38 +01:00

Bit a simple text object isn't considered a complex scene isn't it
Except the fact that it's affecting cycles also

See the pictures above again it's not that clear if you don't open them in a new tab 🙄

And the only problem i can see is this node isn't it

Bit a simple text object isn't considered a complex scene isn't it Except the fact that it's affecting cycles also See the pictures above again it's not that clear if you don't open them in a new tab 🙄 And the only problem i can see is this node isn't it

Steffen Dünner commented

2021-11-10 09:50:35 +01:00

Added subscriber: @SteffenD

Behe eddine commented

2021-11-10 11:34:48 +01:00

geometry nodes.crash.txt

so this is the crash file of this project when rendering with eevee

with cycles I rechecked with other file when I disable realize instances node with cycles motion blur works normally when I enable this nose
the motion blur has no effect anymore

[geometry nodes.crash.txt](https://archive.blender.org/developer/F11785555/geometry_nodes.crash.txt) so this is the crash file of this project when rendering with eevee with cycles I rechecked with other file when I disable realize instances node with cycles motion blur works normally when I enable this nose the motion blur has no effect anymore

Jacques Lucke commented

2021-11-19 10:53:50 +01:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2021-11-19 10:53:50 +01:00

The crash will be fixed by D13272.

The motion blur problem is probably a limitation right now. Deformation motion blur might not work with the geometry nodes modifier (also see the warning in https://docs.blender.org/manual/en/3.0/render/cycles/object_settings/object_data.html#bpy-types-cyclesobjectsettings-use-motion-blur). It's surprising that it works in Eevee. Still have to check in more detail where it fails in Cycles exactly.

The crash will be fixed by [D13272](https://archive.blender.org/developer/D13272). The motion blur problem is probably a limitation right now. Deformation motion blur might not work with the geometry nodes modifier (also see the warning in https://docs.blender.org/manual/en/3.0/render/cycles/object_settings/object_data.html#bpy-types-cyclesobjectsettings-use-motion-blur). It's surprising that it works in Eevee. Still have to check in more detail where it fails in Cycles exactly.

Gerstmann Bradley commented

2021-11-19 23:41:05 +01:00

Added subscriber: @Bradley_G

Richard Antalik commented

2022-02-16 20:09:08 +01:00

Added subscriber: @iss

Richard Antalik commented

2022-02-16 20:09:08 +01:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Richard Antalik commented

2022-02-16 20:09:08 +01:00

I can't reproduce crash with provided file and older build, so can't tell whether this was resolved.

@BEHE can you confirm if this issue was resolved?

I can't reproduce crash with provided file and older build, so can't tell whether this was resolved. @BEHE can you confirm if this issue was resolved?

Pratik Borhade commented

2022-02-25 03:56:42 +01:00

Changed status from 'Needs User Info' to: 'Needs Developer To Reproduce'

Pratik Borhade commented

2022-02-25 03:56:42 +01:00

@iss , crash report was related to #92682 and got fixed already.

The motion blur problem is probably a limitation right now. Deformation motion blur might not work with the geometry nodes modifier (also see the warning in
https://docs.blender.org/manual/en/3.0/render/cycles/object_settings/object_data.html#bpy-types-cyclesobjectsettings-use-motion-blur). It's surprising that it works in Eevee.
Still have to check in more detail where it fails in Cycles exactly.

Setting status to Need Info from Developers for now, since investigation is needed (feel free to revert).

@iss , crash report was related to #92682 and got fixed already. > The motion blur problem is probably a limitation right now. Deformation motion blur might not work with the geometry nodes modifier (also see the warning in > https://docs.blender.org/manual/en/3.0/render/cycles/object_settings/object_data.html#bpy-types-cyclesobjectsettings-use-motion-blur). It's surprising that it works in Eevee. > Still have to check in more detail where it fails in Cycles exactly. Setting status to `Need Info from Developers` for now, since investigation is needed (feel free to revert).

Philipp Oeser removed the

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realize instances node will cause problems with motion blur #92958