Vertex painting crash when tessellation is on with raytracing

Development Rendering
1

Hi,
I’m having this problem whenever I enter vertex paint mode and switch to rgb (or any color mode) where UE will crash. It seems like enabling tessellation in the material is root of the problem.
If I go into the material and turn tessellation from Flat Tessellation to No Tessellation I can vertex paint fine but then i have no displacement.

This the crash when tessellation is enabled in the material.

55.gif
https://forums.unrealengine.com/core/image/gif;base64

When I disable tessellation in the material I can vertex paint fine.

​​ vertex.gif
https://forums.unrealengine.com/core/image/gif;base64
​

Fatal error: [File:D:/Build/++UE4+Licensee/Sync/Engine/Source/Runtime/RHI/Private/PipelineStateCache.cpp] [Line: 139] Shader compilation failures are Fatal.

1750db15c3957d46cb1fcf2300436de95feeb858.jpeg

Does anyone know a way around this?

2

I’m also having this issue, did this get resolved?

3

Same issue for me. I think this is DX12 related and not specifically raytracing. Also switching the viewport to visualize lightmap density crashes UE if DX12 is enabled.