Skeletalmesh generated LOD have issue with vertex color displacement

UE - LD & Modeling - Modeling Tools - Mesh Editing - May 22, 2020

This one should be fix in the squeletalmesh quadric reduction own by the geometry tools. ...

Height fog removed in split screen when player1 is facing the opposite direction.

UE - Graphics Features - Sep 23, 2021

Please see the UDN for a potential fix/workaround description. ...

Inaccurate motion vectors when using different position binding in renderer

UE - Niagara - Rendering - Jul 27, 2023

Even though the particles are not moving, and the velocity is zero, the output motion vectors are non-zero. This seems to only happen if using two sources of particle positions.  ...

FAsyncIOSystemBase::QueueDestroyHandleRequest fatal error crash on launch or package

UE - Foundation - Core - Jun 23, 2015

Fatal error due to FAsyncIOSystemBase::QueueDestroyHandleRequest during launching and packaging projects. May be linked to: [Link Removed] ...

Timing appears to be different for the first call of tick

UE - Gameplay - Nov 30, 2016

Timing appears to be different for the first call of tick causing the camera to appear in a different area than what it was in 4.13 This issue appears to be a regression ...

Duplicated TextureLoadVirtualPageTable in GetCustomData functions in generated HLSL add to the total instruction count due to TextureLoad having side effects

UE - Rendering Architecture - Materials - Dec 4, 2024

When using materials with CustomData inputs, such as the Eye material with Iris Distance and Mask, Virtual Texture samples will increase the instruction count for each unique VTPageResult. Each cus ...

PlatformerGame has blank white background during intro cut scene on tvOS

Docs - Samples - Oct 10, 2016

Blank white screen during opening cutscene tvOS 10.0 ...

AbsoluteWorldPosition and PDO not working correctly in SingleLayerWater calculations

UE - Graphics Features - Oct 1, 2021

The licensee has provided a recommended fix for this issue. Please see the UDN.  ...

WMR native plugin trigger axis not working

UE - Platform - XR - Nov 19, 2018

We are testing the new Windows Mixed Reality native support and have found that the trigger mapping to a button is working, but the trigger mapping to an axis is not, i.e. the event MotionController ...

Rounding errors are present in FJsonValue::TryGetNumber(int64&) and FMath::RoundHalfFromZero()

UE - Foundation - Core - Mar 8, 2019

A licensee reported a bug in rounding of a call to FJsonValue::TryGetNumber(int64&) with large values.  In investigating this, it appears that equivalent problems also exist in FMath:: rounding func ...