Keying rotation with quaternion interpolation can give unexpected results

UE - Anim - Sequencer - Jul 16, 2020

Adding keys when quaternion interpolation is enabled can lead to unexpected results.  ...

Flickering artifacts are rendered when using Sky Atmosphere Component with Vulkan

UE - Rendering Architecture - RHI - Jul 16, 2020

Rendering the SkyAtmopshere component using Vulkan with and without Vulkan (SM5) enabled causes artifacts to appear on screen on Windows and Linux.  This was reported and tested in 4.25.1 (CL-135 ...

Landscape normal behaves differently on CPU vs GPU

UE - LD & Modeling - Terrain - Landscape - Jul 16, 2020

One of our licensees encountered this issue. Landscape normal is calculated differently on GPU vs CPU. See screenshot below: left is GPU (with Edit Layers enabled) and CPU (Layers disabled) [Image ...

A hidden dedicated server is launched when playing as client

UE - Networking - Jul 15, 2020

When we play in editor with the Play Net Mode set to Play as Client, a hidden dedicated server is launched. Previously in 4.24 the dedicated server would always launch with a visible command window. ...

Crash after setting material of Text Render actor to an instance of the default material

UE - Graphics Features - Jul 15, 2020

Setting the material of Text Render to an instance of the default material then running as in Standalone results in a crash. ...

Take recorder does not record detachment and multiple attachments correctly.

UE - Anim - Sequencer - Jul 14, 2020

Recording attachment will can add multiple sections to an attach track in Take Recorder. ...

[CrashReport] UE4Editor-D3D12RHI!static void SetRayTracingHitGroup(class FD3D12CommandContext & const, class FD3D12RayTracingShaderTable *,

UE - Rendering Architecture - RHI - Jul 14, 2020

Generated from CrashReporter Error Message: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000088 User message (Aritzia_Bistro.log): datasmith re-import ...

Local space particle with SkeletalMeshLocation on scaled mesh is doubly scaled

UE - Niagara - Jul 14, 2020

MeshCurrSamplingBonesBuffer already has scaled bone transforms, but these scales have not been cancelled out when using local space. ...

Ensure condition failed : SkeletalMeshLocation module on scaled SkeletalMesh

UE - Niagara - Jul 14, 2020

The message in ensure is below LogOutputDevice: Error: === Handled ensure: === LogOutputDevice: Error: Ensure condition failed: (FMath::Abs(1.f - M.GetScaledAxis(EAxis::X).SizeSquared()) <= (1.e-4 ...

Blueprint Properties retain meta data through a type change

UE - Gameplay - Blueprint Editor - Jul 13, 2020

Instead of clearing the metadata we should enable editing the metadata for vectors since the details panel supports it already.  ...