UE 5.7 Pathtracer Fatal error in large scenes

Development Rendering
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1

Hello,

after upgrading a project from 5.5 to 5.7, I get the following crash in Pathtracer:

Fatal error: [File:D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Util.cpp] [Line: 1030]

Adapter->CreateCommittedResource( InDesc, GetGPUMask(), HeapProps, InInitialD3D12Access, InResourceStateMode, DefaultAccess, InClearValue, &NewResource, InName, false) failed

at D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12PoolAllocator.cpp:524

with error E_INVALIDARG

It happens in Editor and MRQ (Remote Rendering, Editor closed).

It seems to be an issue with the amount of data. When I remove some meshes, it renders fine. No particular mesh seems to be the culprit but just the total amount of data. I cannot share my level due to confidentiality but it is has around 85 000 static mesh actors.

I changed some pool and heap Cvars but to no avail. I tested it on different machines but neither more RAM nor VRAM make a difference. Nanite makes no difference either.

I did not run into this limit in 5.5. I could view this and even larger scenes in Pathtracer without any issues.

Any suggestions on what else to try or data I could provide to analyse the issue are greatly appreciated. :slight_smile:

Best regards,

Philipp

2

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Screenshot_51091×661 62.6 KB

I get the same error when loading one Level, which worked well on unreal 5.6. The level on Lumen and I was eventually able to load it when I deleted the geometry uploaded via datasmith from 3dsmax. I was waiting for it to be fixed on 5.7.1, but the error remained in the same place. Nvidia rtx a4000 graphics card and latest Studio 581.80 drivers

3

Did you guys check in the logs that Unreal outputs to your project directory Saved/Logs folder? This has helped us troubleshoot crashes many times. There will be a lot more information there and help pinpoint what is crashing the engine.

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(post deleted by author)

5

Thank you for the suggestion. Unfortunately, I did not find anything useful in the log. This is the relevant part:

[2025.12.03-08.08.42:205][105]LogD3D12RHI: Display: D3D12 CreateCommittedResource failed with params:
Heap Type: 1
Heap Flags: 4096
Resource Dimension: 1
Resource Width: 16893824
Resource Height: 1
Array Size: 1
Mip Levels: 1
Format: 0
Resource Flags: 0
[2025.12.03-08.08.42:205][105]LogD3D12RHI: Error: Adapter->CreateCommittedResource( InDesc, GetGPUMask(), HeapProps, InInitialD3D12Access, InResourceStateMode, DefaultAccess, InClearValue, &NewResource, InName, false) failed
at D:\build++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12PoolAllocator.cpp:524
with error E_INVALIDARG

[2025.12.03-08.08.42:216][105]LogWindows: Error: appError called: Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Util.cpp] [Line: 1030]
Adapter->CreateCommittedResource( InDesc, GetGPUMask(), HeapProps, InInitialD3D12Access, InResourceStateMode, DefaultAccess, InClearValue, &NewResource, InName, false) failed
at D:\build++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12PoolAllocator.cpp:524
with error E_INVALIDARG

[2025.12.03-08.08.42:216][105]LogWindows: Windows GetLastError: Der Vorgang wurde erfolgreich beendet. (Translation: Process completed successfully) (0)
[2025.12.03-08.08.50:725][105]LogRHI: Error: Breadcrumbs ‘RHIThread’

  • Scene
  • RenderGraphExecute - /ViewFamilies
  • SceneRender - ViewFamilies
  • Frame 17104

[2025.12.03-08.08.50:725][105]LogThreadingWindows: Error: Runnable thread RHIThread crashed.
[2025.12.03-08.08.50:725][105]LogWindows: Error: === Critical error: ===
[2025.12.03-08.08.50:725][105]LogWindows: Error:
[2025.12.03-08.08.50:725][105]LogWindows: Error: Fatal error: [File:D:\build++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Util.cpp] [Line: 1030]
[2025.12.03-08.08.50:725][105]LogWindows: Error: Adapter->CreateCommittedResource( InDesc, GetGPUMask(), HeapProps, InInitialD3D12Access, InResourceStateMode, DefaultAccess, InClearValue, &NewResource, InName, false) failed
[2025.12.03-08.08.50:725][105]LogWindows: Error: at D:\build++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12PoolAllocator.cpp:524
[2025.12.03-08.08.50:725][105]LogWindows: Error: with error E_INVALIDARG

The rest is just the stack trace.

Also happens in 5.7.1