Steam VR - Wrong Key returned on Action Mapping

UE - Platform - XR - Feb 17, 2020

VR InputAction returns wrong Key. Did not reproduce with Rift Confirmed in 4.26 MAIN @ CL 11451261 ...

UMG Crashes When Using "Create Dynamic Material Instance" With An Optional Name Twice

UE - Editor - UI Systems - Feb 17, 2020

When using an Optional Name parameter in Create Dynamic Material Instance while using the same Optional Name twice in UMG the engine crashes. I have tested this in a actor blueprint that applies th ...

Skybox Textures Have a Seam When Using a Cube With Inverted Normals

UE - Graphics Features - Feb 14, 2020

Skybox textures can have a seam when using an inverted cube for a sky. Attached is an example 4.24.2 project. Note: One of the attached seam screenshots is hard to see unless you expand it. Found ...

Geometry Collection crashing in Vulkan

UE - Simulation - Physics - Dec 2, 2019

After adding a Cube to the Viewport and creating a Geometry Collection the Editor will crashing in the Vulkan RHI. This crash does not happen in DirectX or if the Geometry Collection is made before ...

Opening blueprint macro library opens an unrecognized tab of compiler results

UE - Gameplay - Blueprint Editor - Oct 29, 2019

When a blueprint macro library is opened, an unrecognized tab of compiler results would open with it. Below is the warning message: LogTabManager: Warning: Cannot spawn tab because no spawner is r ...

Instanced static meshes fire an erroneous performance assert about loose parameters.

UE - Graphics Features - Sep 4, 2019

 "This ensure is intended to catch regressions where rendering programmers add a loose parameter to LocalVertexFactory, breaking dynamic instancing on regular static meshes.  InstancedStaticMeshes c ...

Blueprints: Dragging variables into Categories with camel case naming adds spaces to the Category name; creating a second category in details view

UE - Gameplay - Blueprint Editor - Jul 18, 2019

In a blueprint: When dragging a variable onto a Category, and the Category name uses CamelCase, the resulting Category name of the variable will have spaces where the original did not.  "TestCategor ...

Assert on PIE in TM-ShaderModels: GD3D11RHI->GetQueryData(Query->Resource, &Query->Result, sizeof(Query->Result), Query->QueryType, true, false)

UE - Rendering Architecture - RHI - Jun 11, 2019

Hit a crash attempting to PIE. I then attempted to run with -d3ddebug but the crash stopped and has not occurred since. I was not able to reproduce this on a default level, only TM-ShaderModels On ...

Mobile VR - Render Targets not working with Mobile Multi-View

UE - Platform - XR - Jun 6, 2019

Render target materials display as black on mobile VR when Mobile Multi-View is enabled. Also confirmed with LDR capture source. User also reports issues with scene depth (potentially fixed with [ ...