when opening a .blend in 4.1 that was created in 3.6, Blender hard crashes when changing the cycles viewport render pass from the viewport shading menu #114336

New Issue

michael campbell · 2023-10-31T18:10:17+01:00

michael campbell commented

2023-10-31 18:10:17 +01:00

System Information
Operating system: Windows-10-10.0.19045-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 537.58

Blender Version
Broken: version: 4.1.0 Alpha, branch: main, commit date: 2023-10-27 00:53, hash: ce027579e02f
Worked: (non)

Short description of error
hard crash when changing viewport pass, in a specific scene (link below)

Exact steps for others to reproduce the error

download the free evermotion scene from: https://blendermarket.com/products/15th-anniversary-scene-for-blender
turn on simplify so viewport max texture resolution is 256 and 1 subdivision
set importance map to manual and 2046 max resolution (in world tab under surface)
turn off viewport denoising
start cycles viewport
when it's finished building the scene and the pixels start to show, change the viewport render pass to transmission indirect, then emission, and a few more until it crashes.

When it crashes I have plenty of system ram available (18GB), and VRAM has a GB spare. Persistent data is disabled. So it doesn't appear to be a resource issue.

I tried in 3.63 and it also crashes, even turning on camera culling and setting all object to camera cull, still crashes.

**System Information** Operating system: Windows-10-10.0.19045-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 1070/PCIe/SSE2 NVIDIA Corporation 4.6.0 NVIDIA 537.58 **Blender Version** Broken: version: 4.1.0 Alpha, branch: main, commit date: 2023-10-27 00:53, hash: `ce027579e02f` Worked: (non) **Short description of error** hard crash when changing viewport pass, in a specific scene (link below) **Exact steps for others to reproduce the error** 1. download the free evermotion scene from: https://blendermarket.com/products/15th-anniversary-scene-for-blender 2. turn on simplify so viewport max texture resolution is 256 and 1 subdivision 3. set importance map to manual and 2046 max resolution (in world tab under surface) 4. turn off viewport denoising 5. start cycles viewport 6. when it's finished building the scene and the pixels start to show, change the viewport render pass to transmission indirect, then emission, and a few more until it crashes. When it crashes I have plenty of system ram available (18GB), and VRAM has a GB spare. Persistent data is disabled. So it doesn't appear to be a resource issue. I tried in 3.63 and it also crashes, even turning on camera culling and setting all object to camera cull, still crashes. ![image](/attachments/c1645300-a69c-4e65-92eb-e58f35c68ce6)

image.png

363 KiB

AE_15th Scene.crash.txt

33 KiB

michael campbell added the

labels 2023-10-31 18:10:18 +01:00

michael campbell commented

2023-10-31 18:28:12 +01:00

Incidentally, the next two times I try and start Blender, it takes AGES to start, third time it's back to opening immediately. I notice this is usually the case after a Blender hard crash.

michael campbell commented

2023-10-31 18:35:18 +01:00

OK, I found the cause. The file was designed for Blender 3.6, I first tested in 4.1 as I understand scene's are always forward compatible (usually), I forgot I'd saved it before trying in 3.63, so that must have made the file unusuable in 3.6.

Redownloading the file allows me to avoid the bug in 3.63, so this report is more about a forward compatibility issue it seems.

OK, I found the cause. The file was designed for Blender 3.6, I first tested in 4.1 as I understand scene's are always forward compatible (usually), I forgot I'd saved it before trying in 3.63, so that must have made the file unusuable in 3.6. Redownloading the file allows me to avoid the bug in 3.63, so this report is more about a forward compatibility issue it seems.

michael campbell changed title from ~~Blender hard crashes when changing the cycles viewport render pass from the viewport shading menu~~ to when opening a .blend in 4.1 that was created in 3.6, Blender hard crashes when changing the cycles viewport render pass from the viewport shading menu

2023-10-31 18:46:30 +01:00

Germano Cavalcante commented

2023-10-31 21:57:15 +01:00

I cannot reproduce this with either the latest stable or current development versions of Blender:

Can you try the latest daily build? https://builder.blender.org/download/

Go to File → Defaults → Load Factory Settings and then load your file to see if you still can reproduce this issue.

If the problem persists, please upload the crash log located in C:\Users\[your username]\AppData\Local\Temp\[project name].crash.txt (or simply type %TEMP% into the path bar of the Windows Explorer).

Preferably also try to narrow down the problem.
Normally .blend files can be simplified by removing most objects and disabling settings, until the problem reveals itself more clearly.

I cannot reproduce this with either the latest stable or current development versions of Blender: Can you try the latest daily build? https://builder.blender.org/download/ Go to File → Defaults → Load Factory Settings and then load your file to see if you still can reproduce this issue. If the problem persists, please upload the crash log located in `C:\Users\[your username]\AppData\Local\Temp\[project name].crash.txt` (or simply type `%TEMP%` into the path bar of the Windows Explorer). Preferably also try to narrow down the problem. Normally .blend files can be simplified by removing most objects and disabling settings, until the problem reveals itself more clearly.

Germano Cavalcante added

Status

Needs Information from User

and removed

Status

Needs Triage

labels 2023-10-31 21:57:31 +01:00

michael campbell commented

2023-10-31 21:59:58 +01:00

Hi, sure I'll try again, the crash log is already attached by the way 👍

Germano Cavalcante commented

2023-10-31 22:02:33 +01:00

I skipped one of the steps!
Actually I can replicate the crash:

>	blender.exe!ccl::PathTraceWork::get_display_pass_access_info(ccl::PassMode pass_mode) Line 159	C++
 	blender.exe!ccl::PathTraceWorkCPU::copy_to_display(ccl::PathTraceDisplay * display, ccl::PassMode pass_mode, int num_samples) Line 178	C++
 	blender.exe!ccl::PathTrace::update_display(const ccl::RenderWork & render_work) Line 670	C++
 	blender.exe!ccl::PathTrace::render_pipeline(ccl::RenderWork render_work) Line 229	C++
 	blender.exe!ccl::PathTrace::render(const ccl::RenderWork & render_work) Line 170	C++
 	blender.exe!ccl::Session::run_main_render_loop() Line 202	C++
 	blender.exe!ccl::Session::thread_render() Line 273	C++
 	blender.exe!ccl::Session::thread_run() Line 241	C++
 	[Inline Frame] blender.exe!std::_Func_class<void>::operator()() Line 883	C++
 	blender.exe!ccl::thread::run(void * arg) Line 40	C++
 	[External Code]

I'll try to simplify the file...

I skipped one of the steps! Actually I can replicate the crash: ``` > blender.exe!ccl::PathTraceWork::get_display_pass_access_info(ccl::PassMode pass_mode) Line 159 C++ blender.exe!ccl::PathTraceWorkCPU::copy_to_display(ccl::PathTraceDisplay * display, ccl::PassMode pass_mode, int num_samples) Line 178 C++ blender.exe!ccl::PathTrace::update_display(const ccl::RenderWork & render_work) Line 670 C++ blender.exe!ccl::PathTrace::render_pipeline(ccl::RenderWork render_work) Line 229 C++ blender.exe!ccl::PathTrace::render(const ccl::RenderWork & render_work) Line 170 C++ blender.exe!ccl::Session::run_main_render_loop() Line 202 C++ blender.exe!ccl::Session::thread_render() Line 273 C++ blender.exe!ccl::Session::thread_run() Line 241 C++ [Inline Frame] blender.exe!std::_Func_class<void>::operator()() Line 883 C++ blender.exe!ccl::thread::run(void * arg) Line 40 C++ [External Code] ``` I'll try to simplify the file...

Germano Cavalcante added

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when opening a .blend in 4.1 that was created in 3.6, Blender hard crashes when changing the cycles viewport render pass from the viewport shading menu #114336