Description

Top 10 ensure in 4.15.

There was a fix submitted for [Link Removed] which was verified as following those steps to reproduce no longer causes this.

Steps to Reproduce

random occurrence while changing between landscape more and other mode while having a landscape actor in a map with material applied to it

Callstack
Error Message

Ensure condition failed: false [File:D:\Build\++UE4+Release-4.15+Compile\Sync\Engine\Source\Runtime\Engine\Private\PrimitiveSceneProxy.cpp] [Line: 599] PrimitiveComponent tried to render with Material MaterialInstanceDynamic_58, which was not present in the component's GetUsedMaterials results Owner: Landscape_17, Resource: Landscape

Call Stack

UE4Editor_Engine!FPrimitiveSceneProxy::VerifyUsedMaterial() primitivesceneproxy.cpp:599 
UE4Editor_Engine!FMeshElementCollector::AddMesh() scenemanagement.cpp:233 
UE4Editor_Landscape!FLandscapeComponentSceneProxy::GetDynamicMeshElements() landscaperender.cpp:1863 
UE4Editor_Renderer!FSceneRenderer::GatherDynamicMeshElements() scenevisibility.cpp:1958 
UE4Editor_Renderer!FSceneRenderer::ComputeViewVisibility() scenevisibility.cpp:2617 
UE4Editor_Renderer!FDeferredShadingSceneRenderer::InitViews() scenevisibility.cpp:2860 
UE4Editor_Renderer!FDeferredShadingSceneRenderer::Render() deferredshadingrenderer.cpp:589 
UE4Editor_Renderer!RenderViewFamily_RenderThread() scenerendering.cpp:1728 
UE4Editor_Renderer!TGraphTask<`FRendererModule::BeginRenderingViewFamily'::`21'::EURCMacro_FDrawSceneCommand>::ExecuteTask() taskgraphinterfaces.h:883 
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() taskgraph.cpp:954 
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() taskgraph.cpp:701 
UE4Editor_RenderCore!RenderingThreadMain() renderingthread.cpp:325 
UE4Editor_RenderCore!FRenderingThread::Run() renderingthread.cpp:459 
UE4Editor_Core!FRunnableThreadWin::Run() windowsrunnablethread.cpp:76 

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Fixed
ComponentUE - LD & Modeling - Terrain - Landscape
Affects Versions4.15
Target Fix4.16
Fix Commit3353754
Main Commit3499771
CreatedFeb 22, 2017
ResolvedMay 25, 2017
UpdatedApr 27, 2018