Unreal Engine Issues

Atmosphere related scan line artifacts for Path Tracer with MGPU

There are two UDNs related to this issue.  It makes the Path Tracer unusable with MGPU, with atmosphere enabled. I already have a one-line fix implemented and tested.  The atmosphere scan line arti ...

Source Textures used with a Rect Light are blurry and diffused

This is a regression from 5.0.3 tested in the following streams:BranchChange ListResults//UE5/Release-5.020979098Did not reproduce//UE5/Release-5.123901901Reproduced//UE5/Release-5.224608918Reproduc ...

Serialized Blueprints containing MIDs do not load correctly in packages.

This issue is an easy fix but raises a different problem which is likely ingrained in UE, which is that MIDs should not be serialized out and should always be transient. Unfortunately we are in a po ...

[CrashReport] UE4Editor_MediaAssets!UMediaPlayer::GetPlaylistRef() [mediaplayer.h:890]

Comment from user:double clicked on a media player asset that I just cloned 880 /** 881 * Get the current play list. 882 * 883 * @return The play list. 88 ...

[CrashReport] UE4Editor_Sequencer!FSequencerEdMode::CleanUpMeshTrails() [sequenceredmode.cpp:186]

This is a top crash occurring in the 4.16 release. Despite the callstack occurring in Sequencer, many users are experiencing this crash while working in UMG. User Descriptionsscaling track in widge ...

Failed to compile C++ Code project, for iOS/tvOS in Development, in Xcode 8.3 beta 1

Project fails to build for iOS/tvOS due to:error: non-portable path to file errors. ...

[CrashReport] UE4Editor_Engine!FExpressionInput::Connect() [materialshared.cpp:129]

User comment from crash group:Saving a material layer blend asset. ...

If a HUD blueprint and a UMG blueprint share a material. The material will not show up in Standalone

If a HUD blueprint and a UMG blueprint share a material. The material will not show up in Standalone Note: Sample project is attached ...

Crash importing layered materials from 4.25 to 4.26/4.27

Instance Static Meshes spawned at Runtime do not have collision

Spawning an Instance Static Mesh at runtime does not have collision. This issue appears only in 4.8 Preview 1 and the 4.8 Release branch (tested on CL-2540862), but is fixed in Main Branch as of Ma ...