Unreal Engine Issues

UE-65290

SceneCapture2D Crashes When Changing to a Mobile Preview

SceneCapture2D Crashes When Changing to a Mobile Preview

Description

With a SceneCapture2D actor in a level the editor will crash when changing to a mobile preview.

Working as expected in 4.20 CL# 4369336

Found in 4.21 Preview 1 CL# 4435822 and 4.22 CL# 4470579

This is a regression.

Steps to Reproduce

Users Steps:

  1. Open the Editor
  2. Create a SceneCapture2D Actor and place in the level
  3. Disable Dynamic Shadows for the actor
  4. Change the Preview Rendering Level to any mobile preview

Steps with attached project:

  1. Open attached project
  2. Load "NewMap" 
  3. Set the Preview Rendering Level to "Default High-End Mobile"

Results:
The Editor will crash

Expected:
The rendering level would be set to mobile

Callstack
Assertion failed: UniformBufferRHI.GetReference() [File:D:\Main\Engine\Source\Runtime\RenderCore\Public\UniformBuffer.h] [Line: 85]

UE4Editor_Core!FDebug::AssertFailed() [d:\main\engine\source\runtime\core\private\misc\assertionmacros.cpp:422]
UE4Editor_Renderer!TUniformBuffer<FPrimitiveUniformShaderParameters>::GetUniformBufferRHI() [d:\main\engine\source\runtime\rendercore\public\uniformbuffer.h:86]
UE4Editor_Renderer!SetUniformBufferParameter<FRHIVertexShader * __ptr64,FPrimitiveUniformShaderParameters,FRHICommandList>() [d:\main\engine\source\runtime\shadercore\public\shaderparameterutils.h:495]
UE4Editor_Renderer!FMeshMaterialShader::SetMesh<FRHIVertexShader * __ptr64>() [d:\main\engine\source\runtime\renderer\private\shaderbaseclasses.cpp:428]
UE4Editor_Renderer!TMobileBasePassVSPolicyParamType<FUniformLightMapPolicyShaderParametersType>::SetMesh() [d:\main\engine\source\runtime\renderer\private\mobilebasepassrendering.h:130]
UE4Editor_Renderer!TMobileBasePassDrawingPolicy<FUniformLightMapPolicy>::SetMeshRenderState() [d:\main\engine\source\runtime\renderer\private\mobilebasepassrendering.h:994]
UE4Editor_Renderer!TStaticMeshDrawList<TMobileBasePassDrawingPolicy<FUniformLightMapPolicy> >::DrawElement() [d:\main\engine\source\runtime\renderer\private\staticmeshdrawlist.inl:248]
UE4Editor_Renderer!TStaticMeshDrawList<TMobileBasePassDrawingPolicy<FUniformLightMapPolicy> >::DrawVisibleInner() [d:\main\engine\source\runtime\renderer\private\staticmeshdrawlist.inl:391]
UE4Editor_Renderer!TStaticMeshDrawList<TMobileBasePassDrawingPolicy<FUniformLightMapPolicy> >::DrawVisible() [d:\main\engine\source\runtime\renderer\private\staticmeshdrawlist.inl:422]
UE4Editor_Renderer!DrawVisible() [d:\main\engine\source\runtime\renderer\private\mobilebasepassrendering.cpp:636]
UE4Editor_Renderer!FMobileSceneRenderer::RenderMobileBasePass() [d:\main\engine\source\runtime\renderer\private\mobilebasepassrendering.cpp:988]
UE4Editor_Renderer!FMobileSceneRenderer::Render() [d:\main\engine\source\runtime\renderer\private\mobileshadingrenderer.cpp:300]
UE4Editor_Renderer!UpdateSceneCaptureContentMobile_RenderThread() [d:\main\engine\source\runtime\renderer\private\mobilescenecapturerendering.cpp:422]
UE4Editor_Renderer!UpdateSceneCaptureContent_RenderThread() [d:\main\engine\source\runtime\renderer\private\scenecapturerendering.cpp:425]
UE4Editor_Renderer!TEnqueueUniqueRenderCommandType<`FScene::UpdateSceneCaptureContents'::`12'::CaptureCommandName,<lambda_226a186ec107d37f0c8eac73e2d9dc11> >::DoTask() [d:\main\engine\source\runtime\rendercore\public\renderingthread.h:191]
UE4Editor_Renderer!TGraphTask<TEnqueueUniqueRenderCommandType<`FScene::UpdateSceneCaptureContents'::`12'::CaptureCommandName,<lambda_226a186ec107d37f0c8eac73e2d9dc11> > >::ExecuteTask() [d:\main\engine\source\runtime\core\public\async\taskgraphinterfaces.h:829]
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [d:\main\engine\source\runtime\core\private\async\taskgraph.cpp:679]
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [d:\main\engine\source\runtime\core\private\async\taskgraph.cpp:575]
UE4Editor_RenderCore!RenderingThreadMain() [d:\main\engine\source\runtime\rendercore\private\renderingthread.cpp:333]
UE4Editor_RenderCore!FRenderingThread::Run() [d:\main\engine\source\runtime\rendercore\private\renderingthread.cpp:467]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\main\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]

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Fixed
ComponentUE - Platform - Mobile
Affects Versions4.21, 4.22
Target Fix4.21
Fix Commit4485365
Main Commit4551290
Release Commit4485365
CreatedOct 16, 2018
ResolvedOct 18, 2018
UpdatedSep 16, 2019
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