Unreal Engine Issues

UE-40462

Ensure occurs when turning on Vector Fields Developer Flag

Ensure occurs when turning on Vector Fields Developer Flag

Description

The editor crashes with an ensure in the output log when Vector Field flag is toggled on in the show options of the viewport. 

LogOutputDevice:Error: === Handled ensure: ===
LogOutputDevice:Error: Ensure condition failed: false [File:D:\Build\++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\Engine\Private\PrimitiveSceneProxy.cpp] [Line: 598]
LogOutputDevice:Error: PrimitiveComponent tried to render with Material LevelColorationUnlitMaterial, which was not present in the component's GetUsedMaterials results
LogOutputDevice:Error:     Owner: Vector_Test_2, Resource: Vector_Test
LogOutputDevice:Error: Stack: 
LogOutputDevice:Error: UE4Editor-Core.dll!FWindowsPlatformStackWalk::StackWalkAndDump() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\windows\windowsplatformstackwalk.cpp:200]
LogOutputDevice:Error: UE4Editor-Core.dll!FDebug::EnsureFailed() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:233]
LogOutputDevice:Error: UE4Editor-Core.dll!FDebug::OptionallyLogFormattedEnsureMessageReturningFalse() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:360]
LogOutputDevice:Error: UE4Editor-Engine.dll!FPrimitiveSceneProxy::VerifyUsedMaterial() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\primitivesceneproxy.cpp:598]
LogOutputDevice:Error: UE4Editor-Engine.dll!FMeshElementCollector::AddMesh() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\scenemanagement.cpp:233]
LogOutputDevice:Error: UE4Editor-Engine.dll!GetVectorFieldMesh() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\vectorfieldvisualization.cpp:261]
LogOutputDevice:Error: UE4Editor-Engine.dll!FGPUSpriteDynamicEmitterData::GetDynamicMeshElementsEmitter() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\particles\particlegpusimulation.cpp:2998]
LogOutputDevice:Error: UE4Editor-Engine.dll!FParticleSystemSceneProxy::GetDynamicMeshElements() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\particles\particlesystemrender.cpp:6897]
LogOutputDevice:Error: UE4Editor-Renderer.dll!FSceneRenderer::GatherDynamicMeshElements() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\renderer\private\scenevisibility.cpp:1958]
LogOutputDevice:Error: UE4Editor-Renderer.dll!FSceneRenderer::ComputeViewVisibility() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\renderer\private\scenevisibility.cpp:2617]
LogOutputDevice:Error: UE4Editor-Renderer.dll!FDeferredShadingSceneRenderer::InitViews() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\renderer\private\scenevisibility.cpp:2860]
LogOutputDevice:Error: UE4Editor-Renderer.dll!FDeferredShadingSceneRenderer::Render() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\renderer\private\deferredshadingrenderer.cpp:589]
LogOutputDevice:Error: UE4Editor-Renderer.dll!RenderViewFamily_RenderThread() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\renderer\private\scenerendering.cpp:1728]
LogOutputDevice:Error: UE4Editor-Renderer.dll!TGraphTask<`FRendererModule::BeginRenderingViewFamily'::`21'::EURCMacro_FDrawSceneCommand>::ExecuteTask() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:883]
LogOutputDevice:Error: UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksNamedThread() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:954]
LogOutputDevice:Error: UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksUntilQuit() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:701]
LogOutputDevice:Error: UE4Editor-RenderCore.dll!RenderingThreadMain() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:325]
LogOutputDevice:Error: UE4Editor-RenderCore.dll!FRenderingThread::Run() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:459]
LogOutputDevice:Error: UE4Editor-Core.dll!FRunnableThreadWin::Run() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]
LogOutputDevice:Error: UE4Editor-Core.dll!FRunnableThreadWin::GuardedRun() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:33]
LogOutputDevice:Error: KERNEL32.DLL!0x000000007A988364
LogOutputDevice:Error: ntdll.dll!0x000000007AEC70D1

This is a Regression from 4.14.3

Steps to Reproduce
  1. Open QAGame
  2. Open TM-ShowFlags_Developer ( Maps > Rendering)
  3. Click Show in the viewport
  4. In the dropdown, go to Developer under All Show Flags
  5. Toggle on Vector Fields

Result: Ensure crash in Output Log

Expected Result: The editor remains stable

Callstack
LogOutputDevice:Error: === Handled ensure: ===
LogOutputDevice:Error: Ensure condition failed: false [File:D:\Build\++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\Engine\Private\PrimitiveSceneProxy.cpp] [Line: 598]
LogOutputDevice:Error: PrimitiveComponent tried to render with Material LevelColorationUnlitMaterial, which was not present in the component's GetUsedMaterials results
LogOutputDevice:Error:     Owner: Vector_Test_2, Resource: Vector_Test
LogOutputDevice:Error: Stack: 
LogOutputDevice:Error: UE4Editor-Core.dll!FWindowsPlatformStackWalk::StackWalkAndDump() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\windows\windowsplatformstackwalk.cpp:200]
LogOutputDevice:Error: UE4Editor-Core.dll!FDebug::EnsureFailed() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:233]
LogOutputDevice:Error: UE4Editor-Core.dll!FDebug::OptionallyLogFormattedEnsureMessageReturningFalse() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:360]
LogOutputDevice:Error: UE4Editor-Engine.dll!FPrimitiveSceneProxy::VerifyUsedMaterial() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\primitivesceneproxy.cpp:598]
LogOutputDevice:Error: UE4Editor-Engine.dll!FMeshElementCollector::AddMesh() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\scenemanagement.cpp:233]
LogOutputDevice:Error: UE4Editor-Engine.dll!GetVectorFieldMesh() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\vectorfieldvisualization.cpp:261]
LogOutputDevice:Error: UE4Editor-Engine.dll!FGPUSpriteDynamicEmitterData::GetDynamicMeshElementsEmitter() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\particles\particlegpusimulation.cpp:2998]
LogOutputDevice:Error: UE4Editor-Engine.dll!FParticleSystemSceneProxy::GetDynamicMeshElements() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\particles\particlesystemrender.cpp:6897]
LogOutputDevice:Error: UE4Editor-Renderer.dll!FSceneRenderer::GatherDynamicMeshElements() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\renderer\private\scenevisibility.cpp:1958]
LogOutputDevice:Error: UE4Editor-Renderer.dll!FSceneRenderer::ComputeViewVisibility() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\renderer\private\scenevisibility.cpp:2617]
LogOutputDevice:Error: UE4Editor-Renderer.dll!FDeferredShadingSceneRenderer::InitViews() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\renderer\private\scenevisibility.cpp:2860]
LogOutputDevice:Error: UE4Editor-Renderer.dll!FDeferredShadingSceneRenderer::Render() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\renderer\private\deferredshadingrenderer.cpp:589]
LogOutputDevice:Error: UE4Editor-Renderer.dll!RenderViewFamily_RenderThread() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\renderer\private\scenerendering.cpp:1728]
LogOutputDevice:Error: UE4Editor-Renderer.dll!TGraphTask<`FRendererModule::BeginRenderingViewFamily'::`21'::EURCMacro_FDrawSceneCommand>::ExecuteTask() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:883]
LogOutputDevice:Error: UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksNamedThread() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:954]
LogOutputDevice:Error: UE4Editor-Core.dll!FNamedTaskThread::ProcessTasksUntilQuit() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:701]
LogOutputDevice:Error: UE4Editor-RenderCore.dll!RenderingThreadMain() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:325]
LogOutputDevice:Error: UE4Editor-RenderCore.dll!FRenderingThread::Run() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:459]
LogOutputDevice:Error: UE4Editor-Core.dll!FRunnableThreadWin::Run() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]
LogOutputDevice:Error: UE4Editor-Core.dll!FRunnableThreadWin::GuardedRun() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:33]
LogOutputDevice:Error: KERNEL32.DLL!0x000000007A988364
LogOutputDevice:Error: ntdll.dll!0x000000007AEC70D1

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Won't Fix
ComponentUE - Niagara
Affects Versions4.15, 4.25
CreatedJan 11, 2017
ResolvedAug 18, 2021
UpdatedSep 19, 2021