Unreal Engine Issues and Bug Tracker (UE-189801)

Description

This is not a regression. Tested //UE5/Release-5.1 CL23901901

Within Water Body Custom setting the Water Mesh Override to a Nanite mesh causes a crash. This seems to be the case with any Nanite enabled mesh not just the Cube from the reproduction steps.

Steps to Reproduce

Create or open any project
In the Menu Bar select Edit > Plugins then search for and enable the Water plugin
Restart the Editor
In the Content Browser select Settings then ensure Show Engine Content is enabled
Navigate to Engine > Content > BasicShapes
Right click the Cube static mesh then select Nanite > Nanite
In the Place Actors panel search for and place Water Body Custom in the level
In the Details panel of the Water Body Custom set Water Mesh Override to the Nanite enabled Cube

Expected Results:
The Cube because the mesh for the Water Body Custom or is prevented from being selected.

Actual Results:
The Editor crashes with a Fatal Error.

Callstack

Fatal error: [File:D:\build\++UE5\Sync\Engine\Source\Runtime\RHICore\Private\RHICoreShader.cpp] [Line: 40] 
Shader requested a global uniform buffer of type 'SingleLayerWater' at static slot '[Name: DeferredDecals, Slot: 0]', but it was null. The uniform buffer should be bound using RHICmdList.SetStaticUniformBuffers() or passed into an RDG pass using SHADER_PARAMETER_STRUCT_REF() or SHADER_PARAMETER_RDG_UNIFORM_BUFFER().

UnrealEditor-RHICore.dll!UE::RHICore::ValidateStaticUniformBuffer() [D:\build\++UE5\Sync\Engine\Source\Runtime\RHICore\Private\RHICoreShader.cpp:36]
UnrealEditor-D3D12RHI.dll!UE::RHICore::ApplyStaticUniformBuffers<FD3D12CommandContext,FD3D12PixelShader>() [D:\build\++UE5\Sync\Engine\Source\Runtime\RHICore\Public\RHICoreShader.h:53]
UnrealEditor-D3D12RHI.dll!FD3D12CommandContext::RHISetGraphicsPipelineState() [D:\build\++UE5\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Commands.cpp:855]
UnrealEditor-RHI.dll!FRHICommand<FRHICommandSetGraphicsPipelineState,FRHICommandSetGraphicsPipelineStateString1541>::ExecuteAndDestruct() [D:\build\++UE5\Sync\Engine\Source\Runtime\RHI\Public\RHICommandList.h:1105]
UnrealEditor-RHI.dll!FRHICommandListBase::Execute() [D:\build\++UE5\Sync\Engine\Source\Runtime\RHI\Private\RHICommandList.cpp:587]
UnrealEditor-RHI.dll!<lambda_7c0987cca588ef3020504727c4b1ede2>::operator()() [D:\build\++UE5\Sync\Engine\Source\Runtime\RHI\Private\RHICommandList.cpp:799]
UnrealEditor-RHI.dll!TRHILambdaCommand<FRHICommandListImmediate,<lambda_7c0987cca588ef3020504727c4b1ede2> >::ExecuteAndDestruct() [D:\build\++UE5\Sync\Engine\Source\Runtime\RHI\Public\RHICommandList.h:457]
UnrealEditor-RHI.dll!FRHICommandListBase::Execute() [D:\build\++UE5\Sync\Engine\Source\Runtime\RHI\Private\RHICommandList.cpp:587]
UnrealEditor-RHI.dll!<lambda_720a96d581de9603c136416f02291598>::operator()() [D:\build\++UE5\Sync\Engine\Source\Runtime\RHI\Private\RHICommandList.cpp:899]
UnrealEditor-RHI.dll!TGraphTask<TFunctionGraphTaskImpl<void __cdecl(void),0> >::ExecuteTask() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Public\Async\TaskGraphInterfaces.h:1310]
UnrealEditor-Core.dll!FNamedTaskThread::ProcessTasksNamedThread() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:758]
UnrealEditor-Core.dll!FNamedTaskThread::ProcessTasksUntilQuit() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Async\TaskGraph.cpp:649]
UnrealEditor-RenderCore.dll!FRHIThread::Run() [D:\build\++UE5\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp:333]
UnrealEditor-Core.dll!FRunnableThreadWin::Run() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsRunnableThread.cpp:149]
UnrealEditor-Core.dll!FRunnableThreadWin::GuardedRun() [D:\build\++UE5\Sync\Engine\Source\Runtime\Core\Private\Windows\WindowsRunnableThread.cpp:79]
KERNEL32.DLL!UnknownFunction []
ntdll.dll!UnknownFunction []

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Cannot Reproduce

Component	UE - LD & Modeling - Terrain - Water
Affects Versions	5.2.1
Target Fix	5.3

Fix Commit	24545925

Created	Jun 28, 2023
Resolved	Jun 28, 2023
Updated	Aug 17, 2023