Unreal Engine Issues

Invalid access location compressing a BC6h texture in the editor

Large texture crashes during Oodle compression with "-stompmalloc". It appears to be an internal Oodle error. Also tested on //UE5/Release-5.5/, CL: 37463908 ...

Depth of Field blur is inconsistent with r.ScreenPercentage == 100 (Dynamic resolution)

Depth of Field, with "r.DOF.Recombine.Quality = 0" will adjust the size of the depth in focus based on screen percentage. This might be related to over-fitting from the tile classification, because ...

Cannot export a Datasmith scene to the Unreal Engine project root folder on MacOS.

This is mac specific. I could do the export normally on Windows with the same Twinmotion CL and UE version (5.5 preview).  It is also a regression specific to 5.5, since I've been able to export a d ...

UE 5.5 delayed Python initialization causes issues

From this UDN: [Link Removed] The customer reports that this issue did not happen in 5.4. ...

Circularly referenced blueprints cause stack overflow in a package game without IOStore

Lighting behavior is unreliable for translucent lit materials, results are inconsistent depending on the editor camera's FOV and the editor viewport's width/height/aspect

When working on the level editor viewport or testing on PIE, the visual appearance of additive/translucent lit materials changes significantly (and abruptly) when varying the camera FOV or the viewp ...

Crash in FPipelineFileCacheManager::RegisterPSOStats

The game can crash when one thread clears RunTimeToPSOUsage while another thread is expecting it to contain a PSO it is registering stats for. Thread A:  calls CacheGraphicsPSO() Thread B:  calls C ...

Long thin splines with wide tangents do not generate correct collision geometry

[Image Removed] [Image Removed] ...

GAS: Initial OnRep_SpawnedAttributes from DefaultStartingData clears attribute values for already replicated ActiveGameplayEffects

Context The property 'DefaultStartingData' in AbilitySystemComponent can be configured from blueprint to spawn default attribute sets. This happens OnRegister. For runtime spawned actors like pawns ...

TraceString for TChar strings has an erroneous return statement leading to unreachable code

In StringTrace.cpp, the TraceString(const TCHAR* InString) function has an erroneous return statement before UE_TRACE_LOG_DEFINITION within the branch checking if the string is already in the set. ...