Separate downsampled translucency manually updates the view uniform buffer without invalidating the cached view.

UE - Rendering Architecture - RHI - May 20, 2019

In TranslucencyRendering.cpp, FDeferredShadingSceneRenderer::RenderTranslucency, the following code: FViewUniformShaderParameters DownsampledTranslucencyViewParameters; SetupDownsampledTranslucenc ...

FCanvasTriangleRendererItem relies on BaseVertexIndex not being zero.

UE - Rendering Architecture - RHI - May 20, 2019

The root of this issue is that FLocalVertexFactory is doing manual vertex fetch in the shader. In HLSL, this relies on SV_VertexId. In GLSL, it's gl_VertexId. HLSL does not include the base vertex i ...

3DS Max 2019 asset has incorrect object position and rotation when imported in Datasmith

UE - Editor - Content Pipeline - Datasmith - Exporters - May 20, 2019

When this asset is imported into 4.22.1(4.22E0) it has incorrect object position and rotation. In 4.21.2 (4.21E3) the asset has the correct object position and rotation. ...

Unclear messaging when trying to make changes to a project when two instances of the project are open at once

UE - Editor - May 20, 2019

If a user has a project open more than once, they will be given an error message when trying to save changes. This message could be more clear as to what issue has occurred. ...

Surface snapping attached actors cause unexpected behavior

Tools - May 17, 2019

Surface snapping causes erratic changes in scale to StaticMeshActors that have children of the same type. The user also has provided a potential solution to this bug (Please see the code below. N ...

Selected Objects Turn Pink in Lightmap Density View Mode

UE - Graphics Features - May 17, 2019

Selected Objects Turn Pink in Lightmap Density View Mode. Works as expected in 4.21 CL# 4753647 Found in 4.22 CL# 6063286 and 4.23 CL# 6395561 This is a regression. ...

Widget animation does not evaluate visibility correctly when played

UE - Anim - Sequencer - May 17, 2019

Widget animation does not evaluate visibility correctly when played. This does work though when scrubbing over the key. Regression: No this also occurs in 4.22 ...

RemoteMac.cs fails to build if ProjectFile is null

UE - Platform - Mobile - May 17, 2019

See CL 6473818. Remote compiling on a Mac is triggering a NullReferenceException for me, making me unable to build. I was able to delete the crashing lines locally to work around it for now.line 91 ...

SceneCapture2D Component Show Flags that are Modified in a Blueprint initially are Copied not Referenced

UE - Graphics Features - May 17, 2019

If you disable show flags in a SceneCapture2D component of a Blueprint, trying to re-enable them in the Blueprint will not update instances in a level. Anything that was left alone will change along ...

Crash: nullptr in FindViewComponentForActor when ActorComponent is attached to Character with Camera Component.

UE - Gameplay - May 17, 2019

Selecting an Actor with a Camera and a C++ inherited Blueprint Component that has sub-components,then compiling the BP component leads to a crash. Upon Debugging the Crash Call Stack: FindViewComp ...