Unreal Engine Issues

Crash in FMovieSceneNumericVariant::Set when loading a Level Sequence with Custom Time Warp on Android

On Android, loading a Level Sequence fatals in the async loading thread: Assertion failed: (NewValue & ~PAYLOAD_Bits) == 0 MovieSceneNumericVariant.cpp:133 Unable to store a pointer outside of a ...

ImportMeshPaintTextureFromVertexColors only works with "Per Instance Vertex Colors"

The "Import Vertex Colors" feature in mesh paint mode only works if the instance had vertex color overrides enabled. This is especially problematic for Nanite meshes since usually you can't add act ...

Layered Blend Per Bone nodes evaluate to 0.0 weight with Blend Masks when s.AsyncLoadingThreadEnabled is active in Editor

When starting the Editor, Layered Blend Per Bone nodes using Blend Masks inside dynamically linked Anim Layers completely ignore the blend pose (evaluating to 0.0 weight for all bones). Disconnectin ...

Editor crashes when overriding Texture Collection in Material Instance

When a Material uses the DefaultTextureCollection and a Material Instance overrides it - or vice versa - the Editor will crash. Note: bindlessconfiguration=Minimal or higher must be enabled to use ...

Unreal 5.7 Trace server not working on Rocky 8

UnrealTraceServer built on a Rocky 8 machine yields a binary that depends on versions of glibc and glibcxx higher than the 2.28 version provided by Rocky 8.$ ldd UnrealTraceServer./UnrealTraceServer ...

SplineMeshComponent resources leak

A race condition occurs in the InitSplineVertexFactory_Internal }}function call, which is distributed across multiple threads. This causes {{FSplineMeshVertexFactory to be instantiated multiple time ...

Color picker widget auto-closes unnecessarily

A licensee reports that the color picket widget in Unreal Editor closes whenever a blueprint actor (map placed instance of an actor blueprint) receives a property changed event, even if the change e ...

Intermittant motion blur issues in content heavy scenes

When using the following RHI/Render thread/GT sync configuration:r.OneFrameThreadLag 1r.GTSyncType 1 The previous skinning bone data can be corrupted and introduce visual artifacts on everything us ...

Virtual Texture Collection doesn't show correct mip level

Textures from VirtualTextureCollections appear blurry because the correct mip level isn’t shown unless FVirtualTextureCollectionResource::InitRHI is modified in VirtualTextureCollection.cpp withProd ...

Sequencer binding resolve fails in packaged builds for actors in non spatially loaded Level Instances