Viewport Rendering and Texture Baking freezes Blender #82483

New Issue

Steve · 2020-11-07T11:10:15+01:00

Steve commented

2020-11-07 11:10:15 +01:00

System Information
Operating system: Windows 7 64bit
Graphics card: GTX 1660 Super

Blender Version
Broken: 2.90.1
Worked: 2.83
Worked: builds prior to b21ba5e579

Short description of error

Blender freeze when baking ambiant occlusion

Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).

I prepared my scene to bake all objects, but almost every time I try to bake an object (especially the table under the tv), blender is often stuck at 0%, using high CPU usage and freeze.CtUrban.blend

Update: Viewport Rendering also crash Blender.

**System Information** Operating system: Windows 7 64bit Graphics card: GTX 1660 Super **Blender Version** Broken: 2.90.1 Worked: 2.83 Worked: builds prior to b21ba5e579 **Short description of error** Blender freeze when baking ambiant occlusion **Exact steps for others to reproduce the error** Based on the default startup or an attached .blend file (as simple as possible). I prepared my scene to bake all objects, but almost every time I try to bake an object (especially the table under the tv), blender is often stuck at 0%, using high CPU usage and freeze.[CtUrban.blend](https://archive.blender.org/developer/F9226825/CtUrban.blend) Update: Viewport Rendering also crash Blender.

Steve commented

2020-11-07 11:10:15 +01:00

Added subscriber: @Snake1726

Philipp Oeser commented

2020-11-10 17:23:48 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2020-11-10 17:23:48 +01:00

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

Philipp Oeser commented

2020-11-10 17:23:48 +01:00

This is due to the Margin being too large (it writes into other islands).

Should not freeze of course, so would assume this is a bug, checking further.

This is due to the Margin being too large (it writes into other islands). Should not freeze of course, so would assume this is a bug, checking further.

Philipp Oeser changed title from ~~Blender freezing when baking ambiant occlusion~~ to Texture Baking freezes if margin is too large and writes into other islands

2020-11-10 17:24:31 +01:00

Philipp Oeser commented

2020-11-10 18:48:54 +01:00

For me, this broke somewhere between b21ba5e579 and f2b5f731d5

Maybe 99436acde8 ?

While bisecting I was also seeing (not sure if this is related to)

blender: /blender/intern/cycles/kernel/../kernel/bvh/bvh_shadow_all.h:396: bool ccl::bvh_intersect_shadow_all_instancing(ccl::KernelGlobals*, const Ray*, ccl::Intersection*, ccl::uint, ccl::uint, ccl::uint*): Assertion `!"Should not happen"' failed.

Not sure if margin has to do with it though, I can also get it to freeze with zero margin

For me, this broke somewhere between b21ba5e579 and f2b5f731d5 Maybe 99436acde8 ? While bisecting I was also seeing (not sure if this is related to) ``` blender: /blender/intern/cycles/kernel/../kernel/bvh/bvh_shadow_all.h:396: bool ccl::bvh_intersect_shadow_all_instancing(ccl::KernelGlobals*, const Ray*, ccl::Intersection*, ccl::uint, ccl::uint, ccl::uint*): Assertion `!"Should not happen"' failed. ``` Not sure if margin has to do with it though, I can also get it to freeze with zero margin

Philipp Oeser changed title from ~~Texture Baking freezes if margin is too large and writes into other islands~~ to Texture Baking freezes

2020-11-10 18:49:07 +01:00

Philipp Oeser commented

2020-11-10 19:07:00 +01:00

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

Philipp Oeser commented

2020-11-10 19:07:00 +01:00

There is something wrong with the urban guy.
If this object is disabled in viewports and rendering, baking seems to go fine.
(will try to contiue investigations tomorrow)

I havent been able to figure out what exactly it is that makes baking fail in this situation, but can you confirm that it works with this objects excluded/deleted?

There is something wrong with the `urban` guy. If this object is disabled in viewports and rendering, baking seems to go fine. (will try to contiue investigations tomorrow) I havent been able to figure out what exactly it is that makes baking fail in this situation, but can you confirm that it works with this objects excluded/deleted?

Philipp Oeser commented

2020-11-10 19:07:20 +01:00

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

Philipp Oeser commented

2020-11-11 14:20:44 +01:00

In #82483#1051971, @lichtwerk wrote:
There is something wrong with the urban guy.
If this object is disabled in viewports and rendering, baking seems to go fine.
(will try to contiue investigations tomorrow)

I havent been able to figure out what exactly it is that makes baking fail in this situation, but can you confirm that it works with this objects excluded/deleted?

Hrmf, testing further, this [urban guy is the culprit] is also not true, will try to profile now where it hangs

> In #82483#1051971, @lichtwerk wrote: > There is something wrong with the `urban` guy. > If this object is disabled in viewports and rendering, baking seems to go fine. > (will try to contiue investigations tomorrow) > > I havent been able to figure out what exactly it is that makes baking fail in this situation, but can you confirm that it works with this objects excluded/deleted? Hrmf, testing further, this [`urban` guy is the culprit] is also not true, will try to profile now where it hangs

Philipp Oeser commented

2020-11-11 14:59:40 +01:00

ASAN will not show any errors, this sometimes goes right the first time, then freezes on a second try (so situation is not even the same in the same build).

Brecht Van Lommel commented

2021-01-21 15:24:48 +01:00

Added subscriber: @brecht

Brecht Van Lommel commented

2021-01-21 15:24:48 +01:00

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

Brecht Van Lommel commented

2021-01-21 15:24:48 +01:00

I'm unable to reproduce this, testing:

2.90.1 and latest 2.92 master
CPU and CUDA baking
Baking multiple objects in the scene multiple times

I'm unable to reproduce this, testing: * 2.90.1 and latest 2.92 master * CPU and CUDA baking * Baking multiple objects in the scene multiple times

Steve commented

2021-01-21 21:07:21 +01:00

I just tried again today with Blender 2.91.1 and 2.92 beta, it crashed after 1-3 attempts to bake textures (AO and Lightmap). I also noticed that the problem only occurs when all objects are selected for rendering, Blender doesn't seem to hang when ignoring objects from the render and baking 1 by 1.

Steve commented

2021-01-21 21:18:17 +01:00

Update: Blender also crash when rendering viewport so this is not related to baking textures as I thought.

Steve changed title from ~~Texture Baking freezes~~ to Viewport Rendering and Texture Baking freezes Blender

2021-01-21 21:20:16 +01:00

Philipp Oeser commented

2021-03-24 15:49:08 +01:00

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

Philipp Oeser commented

2021-03-24 15:49:08 +01:00

Will have to check again

William Leeson commented

2021-10-06 11:01:18 +02:00

Added subscriber: @leesonw

William Leeson commented

2021-10-06 11:01:18 +02:00

I tried this today and noticed 2 things. The first time I tried to bake it started to compile all the kernels which can take a while then I tried selecting many objects and backing them at some point I got the following

intern/cycles/device/cuda/device_impl.cpp

I am guessing we are either freeing some already freed memory or this was an uninitialised pointer. On machine machine this does not cause a crash but it does cause all the CUDA stuff in blender to just stop working which may be the cause of the issue.

I tried this today and noticed 2 things. The first time I tried to bake it started to compile all the kernels which can take a while then I tried selecting many objects and backing them at some point I got the following ## intern/cycles/device/cuda/device_impl.cpp I am guessing we are either freeing some already freed memory or this was an uninitialised pointer. On machine machine this does not cause a crash but it does cause all the CUDA stuff in blender to just stop working which may be the cause of the issue.

Philipp Oeser commented

2022-02-23 15:09:04 +01:00

Changed status from 'Needs Triage' to: 'Needs Developer To Reproduce'

Philipp Oeser commented

2022-02-23 15:09:04 +01:00

In #82483#1231332, @leesonw wrote:
I tried this today and noticed 2 things. The first time I tried to bake it started to compile all the kernels which can take a while then I tried selecting many objects and backing them at some point I got the following

##intern/cycles/device/cuda/device_impl.cpp##

I am guessing we are either freeing some already freed memory or this was an uninitialised pointer. On machine machine this does not cause a crash but it does cause all the CUDA stuff in blender to just stop working which may be the cause of the issue.

@leesonw : not sure what you got there? (seems incomplete)
If I read this right, you were able to repro an issue at that point in time.
Can you still repro?

> In #82483#1231332, @leesonw wrote: > I tried this today and noticed 2 things. The first time I tried to bake it started to compile all the kernels which can take a while then I tried selecting many objects and backing them at some point I got the following > > ##intern/cycles/device/cuda/device_impl.cpp## > > I am guessing we are either freeing some already freed memory or this was an uninitialised pointer. On machine machine this does not cause a crash but it does cause all the CUDA stuff in blender to just stop working which may be the cause of the issue. @leesonw : not sure what you got there? (seems incomplete) If I read this right, you were able to repro an issue at that point in time. Can you still repro?

Philipp Oeser removed the

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Viewport Rendering and Texture Baking freezes Blender #82483

intern/cycles/device/cuda/device_impl.cpp