Unreal Engine Issues

UE-55127

Flat Tessellation broken on DX12 renderer

Flat Tessellation broken on DX12 renderer

UDN
Description

Behavior reproduced in 4.17.2 CL 3658906, 4.18.3 CL 3832480 and 4.19.P4 CL 3873914

To run the engine with DX12 I made a shortcut of the UE4Editor.exe found at D:\Epic Games\UE_4.18\Engine\Binaries\Win64 and added -DX12 to the target

Steps to Reproduce
  1. Run engine with DX12
  2. Create new Blank Project with No Starter Content
  3. Create a new Material
  4. In the Details panel of the material, navigate to the Tessellation section.  In the D3D11 Tessellation Mode drop-down, select Flat Tessellation 

Result: Editor Crash

Expected: Flat tessellation will be applied to material

Callstack
Fatal error: [File:D:\Build\++UE4+Release-4.18+Compile\Sync\Engine\Source\Runtime\D3D12RHI\Private\D3D12Util.cpp] [Line: 242] (Device->*TPSOFunctionMap<TDesc>::GetCreatePipelineState())(Desc, IID_PPV_ARGS(&PSO)) failed at D:\Build\++UE4+Release-4.18+Compile\Sync\Engine\Source\Runtime\D3D12RHI\Private\Windows\WindowsD3D12PipelineState.cpp:582 with error E_INVALIDARG

UE4Editor_Core!FDebug::AssertFailed() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\misc\assertionmacros.cpp:414]
UE4Editor_D3D12RHI!D3D12RHI::VerifyD3D12Result() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\d3d12rhi\private\d3d12util.cpp:242]
UE4Editor_D3D12RHI!CreatePipelineState<D3D12_GRAPHICS_PIPELINE_STATE_DESC>() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\d3d12rhi\private\windows\windowsd3d12pipelinestate.cpp:582]
UE4Editor_D3D12RHI!FD3D12PipelineState::Create() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\d3d12rhi\private\windows\windowsd3d12pipelinestate.cpp:629]
UE4Editor_D3D12RHI!FD3D12PipelineStateCache::Add() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\d3d12rhi\private\windows\windowsd3d12pipelinestate.cpp:288]
UE4Editor_D3D12RHI!FD3D12PipelineStateCache::FindGraphicsLowLevel() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\d3d12rhi\private\windows\windowsd3d12pipelinestate.cpp:241]
UE4Editor_D3D12RHI!FD3D12PipelineStateCache::FindGraphics() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\d3d12rhi\private\windows\windowsd3d12pipelinestate.cpp:194]
UE4Editor_D3D12RHI!FD3D12DynamicRHI::RHICreateGraphicsPipelineState() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\d3d12rhi\private\d3d12state.cpp:336]
UE4Editor_RHI!RHICreateGraphicsPipelineState() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\rhi\public\dynamicrhi.h:929]
UE4Editor_RHI!GetAndOrCreateGraphicsPipelineState() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\rhi\private\pipelinestatecache.cpp:1044]
UE4Editor_RHI!SetGraphicsPipelineState() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\rhi\private\pipelinestatecache.cpp:177]
UE4Editor_Renderer!CommitGraphicsPipelineState<FDepthDrawingPolicy>() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\renderer\public\drawingpolicy.h:271]
UE4Editor_Renderer!FDepthDrawingPolicyFactory::DrawMesh() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\renderer\private\depthrendering.cpp:742]
UE4Editor_Renderer!FDeferredShadingSceneRenderer::RenderPrePassViewDynamic() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\renderer\private\depthrendering.cpp:849]
UE4Editor_Renderer!FDeferredShadingSceneRenderer::RenderPrePassView() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\renderer\private\depthrendering.cpp:986]
UE4Editor_Renderer!FDeferredShadingSceneRenderer::RenderPrePass() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\renderer\private\depthrendering.cpp:1300]
UE4Editor_Renderer!FDeferredShadingSceneRenderer::Render() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\renderer\private\deferredshadingrenderer.cpp:775]
UE4Editor_Renderer!RenderViewFamily_RenderThread() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\renderer\private\scenerendering.cpp:2081]
UE4Editor_Renderer!TGraphTask<`FRendererModule::BeginRenderingViewFamily'::`26'::EURCMacro_FDrawSceneCommand>::ExecuteTask() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\core\public\async\taskgraphinterfaces.h:784]
UE4Editor_Core!FNamedTaskThread::ProcessTasksNamedThread() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:651]
UE4Editor_Core!FNamedTaskThread::ProcessTasksUntilQuit() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\async\taskgraph.cpp:560]
UE4Editor_RenderCore!RenderingThreadMain() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:327]
UE4Editor_RenderCore!FRenderingThread::Run() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\rendercore\private\renderingthread.cpp:461]
UE4Editor_Core!FRunnableThreadWin::Run() [d:\build\++ue4+release-4.18+compile\sync\engine\source\runtime\core\private\windows\windowsrunnablethread.cpp:76]
Community References

Fix UE-51650

"Session Disconnected" UEFN

I am not able to find world outliner how to enable it?

An error occurred while trying to generate project files !?

How can i modify the param name in EQS node

Error UE5 5.0.3

Delay nodes occasionally don't fire the "Completed" output in a nativized build

为什么我的电脑无法安装ue，错误代码一直是IS-IN-BV05,该如何解决

How to have a sound cue follow a PlayerController along a spline?

Bonjour j'ai un petit problème c'est que je ne vois plus l'onglet "scability" pour changer les graphismes de uefn et j'ai pas trouvé l'option pour le faire revenir ?

Have Comments or More Details?

There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-55127 in the post.

1
Login to Vote
Fixed
ComponentUE - Graphics Features
Affects Versions4.17.2, 4.18.3, 4.19
Target Fix4.21
Fix Commit3892339
Main Commit4042226
Release Commit4399518
CreatedFeb 13, 2018
ResolvedFeb 15, 2018
UpdatedOct 2, 2018
View Jira Issue