Unreal Engine Issues and Bug Tracker (UE-41976)

Questions & Answers

Description

This crash will only occur when this criteria is met.

You have enabled custom depth with stencils in the project settings
A mesh in the scene is rendering to custom depth with a stencil value of 1
The mesh has a material applied that is using WPO
You are in a High-End Mobile preview level (ES3_1)

Steps to Reproduce

Open a blank project
Open project settings and enable custom depth with stencils
Select floor mesh and check "render custom depth" then assign stencil value of 1
Create a new material and plug in a vector 3 into WPO make sure the value is greater than (0,0,0)
Compile the material and apply to floor in scene
Click settings button>Preview Rendering level> High-End Mobile/Metal>IOS Preview
Wait for engine to change rendering level

RESULT
The engine crashes after compiling shaders.

EXPECTED
The preview rendering level switches and the material displays.

Callstack

UE4Editor_Engine!FMaterial::GetShader() materialshared.cpp:1796 
UE4Editor_Renderer!FDepthDrawingPolicy::FDepthDrawingPolicy() depthrendering.cpp:326 
UE4Editor_Renderer!FDepthDrawingPolicyFactory::DrawMesh() depthrendering.cpp:735 
UE4Editor_Renderer!FDepthDrawingPolicyFactory::DrawStaticMesh() depthrendering.cpp:820 
UE4Editor_Renderer!FCustomDepthPrimSet::DrawPrims() customdepthrendering.cpp:77 
UE4Editor_Renderer!FSceneRenderer::RenderCustomDepthPass() scenerendering.cpp:1540 
UE4Editor_Renderer!FMobileSceneRenderer::Render() mobileshadingrenderer.cpp:183 
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

Community References

4.15p4 BUG CustomStencil crash on mobile

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Fixed

Component	UE - Platform - Mobile
Affects Versions	4.14.3, 4.15
Target Fix	4.16

Fix Commit	3311347
Main Commit	3383473

Created	Feb 15, 2017
Resolved	Feb 20, 2017
Updated	Sep 16, 2019

UE-41976

Engine Crashes When Previewing ES3_1 With Material Using World Position Offset (Need Custom Stencil)

Engine Crashes When Previewing ES3_1 With Material Using World Position Offset (Need Custom Stencil)

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