Color picker does not change the color of a Vector Parameter in a Material Instance until the mouse button is released

UE - Graphics Features - Mar 11, 2020

This is a regression from 4.23.1 (CL-9631420). The color picker does not update in realtime anymore when holding down the left-mouse button. Only on mouse-release does it update. This was reported ...

Exporting a UE4 Animation into Maya results in wrong skin weight

UE - Editor - Content Pipeline - Datasmith - Importer - Apr 21, 2020

UE4 Mannequin animations are not exporting/importing correctly into Maya. The right hand is bulkier and the left shoulder is dislocated. This was reported and tested in 4.23.1 (CL-9631420). this w ...

Normal of Skeletal Mesh is incorrect when Recompute Tangent is used when Skincache is enabled

UE - Graphics Features - Aug 12, 2020

This issue occurs in Skeletal Mesh depending on the model when Skincache is enabled and affects the rendering. ...

incorrect virtual texture shader code(in FinalizeVirtualTextureFeedback) on Mobile forward platform

UE - Graphics Features - Mar 15, 2021

in the function FinalizeVirtualTextureFeedback, the micro "USE_DBUFFER && MATERIALDECALRESPONSEMASK" returns true on mobile forward, while there is no DBUFFER on Mobile forward obviously. This takes ...

Key input by Sequencer is missing in FBX output of parent-child actors

UE - Anim - Sequencer - Nov 15, 2021

This problem did not occur in 4.27.0. Animation is not output when outputting a hierarchical structure. Actor(A)   ┗Actor(B)     ┗Actor(C) This is how the attachments are registered, and the ke ...

Precomputed AO Mask renders with value of zero after building lighting

UE - Rendering Architecture - Materials - Jan 13, 2023

Regression: Tested in UE5/Release-5.0 at CL 20979098, this issue does not occur so it is a regression.  This issue occurs in 5.1 for both normal light building and GPU Lightmass building. In 5.0 th ...

Save game slot is not saving on the HTC One plus

UE - Platform - Mobile - Jun 17, 2015

Save game slots via blueprints do not work in a packaged game for the HTC one plus. ...

Cannot negatively scale objects in editor with scaling widget

Tools - Mar 18, 2015

Objects do not react well to negative scaling with the scaling widget. Once an object hits 0 then pushes into negative values it begins stuttering between small float values until the user stops goi ...

Staging DLC is reportedly broken

UE - Foundation - Cpp Tools - Automation Tool - Dec 16, 2015

According to a licensee, StageFiles() is called with ExcludeWildcard that contains a directory name ("Engine/*") and bRecursive=true when building DLC. This is not supported by Directory.GetFiles(). ...

HMD Mirror Mode causes vive to have black preview screen

UE - Platform - XR - Jun 23, 2016

[NickW] SteamVR uses HMD Mirror, but this should fail more gracefully Not sure if this is supported for vive, but it puts the user in a state where they can't undo the command (or change back to a ...