GPU crashed when merging actors or importing models

Development World Creation
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1

I got problems when I try to merge multiple static meshes parts of piano in order to create one collision box for the model.
I tried using modeling mode to simply merge them but it would make all piano parts’ materials miss so I’m looking for other methods and encounter this problem.
The piano model is from sketchfab which link is here.

GPU Crash dump Triggered

UnrealEditor_D3D12RHI!D3D12RHI::TerminateOnGPUCrash() [D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Util.cpp:875]
UnrealEditor_D3D12RHI!D3D12RHI::VerifyD3D12Result() [D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Util.cpp:901]
UnrealEditor_D3D12RHI!FD3D12Viewport::PresentChecked() [D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Viewport.cpp:640]
UnrealEditor_D3D12RHI!FD3D12Viewport::Present() [D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Viewport.cpp:709]
UnrealEditor_D3D12RHI!FD3D12CommandContextBase::RHIEndDrawingViewport() [D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Viewport.cpp:916]
UnrealEditor_RHI!FRHICommand<FRHICommandEndDrawingViewport,FRHICommandEndDrawingViewportString2069>::ExecuteAndDestruct() [D:\build\++UE5\Sync\Engine\Source\Runtime\RHI\Public\RHICommandList.h:1245]
UnrealEditor_RHI!FRHICommandListBase::Execute() [D:\build\++UE5\Sync\Engine\Source\Runtime\RHI\Private\RHICommandList.cpp:461]
UnrealEditor_RHI!`FRHICommandListImmediate::ExecuteAndReset'::`35'::<lambda_4>::operator()() [D:\build\++UE5\Sync\Engine\Source\Runtime\RHI\Private\RHICommandList.cpp:772]
UnrealEditor_RHI!TGraphTask<TFunctionGraphTaskImpl<void __cdecl(void),0> >::ExecuteTask() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Async\TaskGraphInterfaces.h:1265]
UnrealEditor_Core!FNamedTaskThread::ProcessTasksNamedThread() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:758]
UnrealEditor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:649]
UnrealEditor_RenderCore!FRHIThread::Run() [D:\build\++UE5\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp:328]
UnrealEditor_Core!FRunnableThreadWin::Run() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsRunnableThread.cpp:149]
2

Hey there @Chromartha! My recommendation would be to adjust the model in an external program like Blender and reimport instead. However the mesh suite shouldn’t be having this crash, so I have a couple questions!

May I know your specs and engine version?

Does the crash occur when merging any meshes and not just the piano? (I ask for being able to replicate it).

3

I just tried merging other meshes and it shows the same crash report I mentioned above. Also I got some GPU crash when I try to rebuilt lighting which a problem occured after the first time of GPU crash. Maybe there are something went wrong after that so I now encounter GPU crash on several situation.

Here is my Spec
Engine: 5.3.2
CPU: Intel i7-12700k
RAM: 64GB
GPU: RTX 4090

4

Umm…
Since I think there probably something of DirectX or my computer went wrong temporary so I reboot my computer and now I can normally rebulit lighting and merge meshes.

5

Interesting! Previously where were issues with a Windows 11 update where some DX issues arose that were promptly corrected, could have been a similar situation. I’m glad it sorted itself!