Description

Changing the properties of M_Glass and M_Metal_Copper to two sided via the property matrix crashes the editor to desktop. (Note: M_Glass with ANY of the M_Metal Materials except M_Metal_Chrome will Crash according to repro.)

CRASHREPORT:             
[Link Removed]
[Link Removed]

Steps to Reproduce

1.  Open a Blank Project with Starter Content
2.  Select M_Glass and M_Metal_Copper
3.  Right-Click and open the two materials in the Property Matrix
4. Select Both Materials in Property Matrix
5.  Click the Two-Sided to True
  
RESULTS:
Crash
  
EXPECTED:
Materials changed to Two-Sided, No Crash  

Callstack
Unknown exception - code 00000001 (first/second chance not available)
 
Couldn't find Shader FHitProxyVS for Material Resource M_Glass!
With VF=FLocalVertexFactory, Platform=PCD3D_SM5 
ShouldCache: Mat=1, VF=1, Shader=1 
Material Usage = MSM_DefaultLit, BLEND_Translucent, TwoSided, TSNormal, Distorted, bUsedWi
 
KERNELBASE + 37901 bytes
UE4Editor_Core!FOutputDeviceWindowsError::Serialize() + 691 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\core\private\windows\windowsplatformoutputdevices.cpp:112]
UE4Editor_Core!FMsg::Logf__VA() + 570 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\core\private\misc\outputdevice.cpp:547]
UE4Editor_Engine!FMaterial::GetShader() + 570 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\engine\private\materials\materialshared.cpp:1416]
UE4Editor_Renderer!FHitProxyDrawingPolicy::FHitProxyDrawingPolicy() + 242 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\renderer\private\scenehitproxyrendering.cpp:171]
UE4Editor_Renderer!FHitProxyDrawingPolicyFactory::AddStaticMesh() + 177 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\renderer\private\scenehitproxyrendering.cpp:264]
UE4Editor_Renderer!FStaticMesh::AddToDrawLists() + 154 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\renderer\private\scenecore.cpp:300]
UE4Editor_Renderer!FPrimitiveSceneInfo::AddStaticMeshes() + 401 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\renderer\private\primitivesceneinfo.cpp:137]
UE4Editor_Renderer!FPrimitiveSceneInfo::AddToScene() + 244 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\renderer\private\primitivesceneinfo.cpp:179]
UE4Editor_Renderer!FScene::AddPrimitiveSceneInfo_RenderThread() + 824 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\renderer\private\rendererscene.cpp:165]
UE4Editor_Renderer!`FScene::AddPrimitive'::`27'::EURCMacro_FAddPrimitiveCommand::DoTask() + 226 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\renderer\private\rendererscene.cpp:341]
UE4Editor_Renderer!TGraphTask<`FScene::AddPrimitive'::`27'::EURCMacro_FAddPrimitiveCommand>::ExecuteTask() + 362 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\core\public\async\taskgraphinterfaces.h:657]
UE4Editor_Core!FTaskThread::ProcessTasks() + 2860 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\core\private\async\taskgraph.cpp:338]
UE4Editor_Core!FTaskThread::ProcessTasksUntilQuit() + 77 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\core\private\async\taskgraph.cpp:177]
UE4Editor_RenderCore!RenderingThreadMain() + 153 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\rendercore\private\renderingthread.cpp:220]
UE4Editor_RenderCore!FRenderingThread::Run() + 78 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\rendercore\private\renderingthread.cpp:320]
UE4Editor_Core!FRunnableThreadWin::Run() + 86 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:69]
UE4Editor_Core!FRunnableThreadWin::GuardedRun() + 93 bytes [d:\buildfarm\buildmachine_++depot+ue4\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:26]
kernel32 + 88557 bytes
ntdll + 181569 bytes

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Fixed
ComponentUE - Graphics Features
Target Fix4.8
Fix Commit2521721
CreatedAug 18, 2014
ResolvedApr 22, 2015
UpdatedApr 27, 2018