Unreal Engine Issues

UE-188179

Crash with Assert after adding large sections to landscape

Crash with Assert after adding large sections to landscape

Description

This is a regression as it does not happen in //UE5/Release-5.1.1

Steps to Reproduce
  1. Create new level > Open Landscape editor
  2. Import a heightmap file in order to create the landscape
  3. Select Add in the Landscape menu and increase the brush size to 32
  4. Add another large section to the side of the landscape. Continue to add large sections

Expected Results: Landscape will be added on to without issues

Actual Results: After adding a few large sections to the landscape the Editor will hang for a few minutes and then crash. When reopening the Editor these strange lines appear on the grid. 

Callstack
UnrealEditor-D3D12RHI!FD3D12DynamicRHI::GetResourceDesc(FRHITextureDesc const &) [D3D12Texture.cpp:534]UnrealEditor-D3D12RHI!FD3D12DynamicRHI::CreateD3D12Texture(FRHITextureCreateDesc const &,FRHICommandListImmediate *,ID3D12ResourceAllocator *) [D3D12Texture.cpp:845]UnrealEditor-D3D12RHI!FD3D12DynamicRHI::RHICreateTexture_RenderThread(FRHICommandListImmediate &,FRHITextureCreateDesc const &) [D3D12Texture.cpp:960]UnrealEditor-Engine!FTextureRenderTarget2DResource::InitDynamicRHI() [TextureRenderTarget2D.cpp:634]UnrealEditor-RenderCore!7ffb660a0000  + 1ff633UnrealEditor-Engine!static void TEnqueueUniqueRenderCommandType<`UTextureRenderTarget2D::ResizeTarget'::`11'::ResizeRenderTargetName,<lambda_dc6125b1fd85689a15226ede4c0596b2> >::DoTask(ENamedThreads::Type, const class TRefCountPtr<FGraphEvent> & const) [RenderingThread.h:209]UnrealEditor-Engine!static void TGraphTask<TEnqueueUniqueRenderCommandType<`UTextureRenderTarget2D::ResizeTarget'::`11'::ResizeRenderTargetName,<lambda_dc6125b1fd85689a15226ede4c0596b2> > >::ExecuteTask(class TArray<FBaseGraphTask *,TSizedDefaultAllocator<32> > & const, ENamedThreads::Type, bool) [TaskGraphInterfaces.h:1310]UnrealEditor-Core!FNamedTaskThread::ProcessTasksNamedThread(int,bool) [TaskGraph.cpp:758]UnrealEditor-Core!FNamedTaskThread::ProcessTasksUntilQuit(int) [TaskGraph.cpp:649]UnrealEditor-RenderCore!7ffb660a0000  + 16bd89UnrealEditor-RenderCore!7ffb660a0000  + 171cf4UnrealEditor-Core!FRunnableThreadWin::Run() [WindowsRunnableThread.cpp:149]UnrealEditor-Core!FRunnableThreadWin::GuardedRun() [WindowsRunnableThread.cpp:79]KERNEL32!7ffc207b0000  + 17614ntdll!7ffc22750000  + 526a1

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Fixed
ComponentUE - LD & Modeling - Terrain
Affects Versions5.2
Target Fix5.4
Fix Commit31229856
Main Commit31229477
Release Commit31229856
CreatedJun 7, 2023
ResolvedFeb 6, 2024
UpdatedFeb 14, 2024
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