Unreal Engine Issues

Luminance coefficients used throughout the engine not matching sRGB standard

This is causing confusion when working with color in UE5, specifically when validating for HDR between different reference materials. It has also been noted that the color primaries in PAL and NTSC ...

UToolMenus::GenerateWidget can crash while calling PopulateMenuBuilder

A user reported that UToolMenus::GenerateWidget will crash if UToolMenus::AddReferencedObject is called during the construction of a menu. Using the above in-code repro steps, I can repro this in a ...

Material containing null expressions crashes when launching the editor with the -Game flag

This comes from a UDN report. [Link Removed] When launching the editor with -game, if a material contains a null expression (for instance because that material expression has been removed), the bin ...

Delete of file that is not at latest fails silently and removes the entry from content browser

Crash when duplicating camera on sequencer with viewport closed

Can be worked around with always keeping a viewport opened. https://udn.unrealengine.com/s/question/0D5QP000002Hfdh0AC [Link Removed] ...

Crash when spawning actor with no viewport initialized

If an attempt to spawn an actor is made before the Level Editor Viewport is fully initialized (i.e. before it has had a chance to get rendered at least once), and that actor has no specific Factory ...

PCG graph always resave in the ResavePackage commandlet

The package that contains the PCGGrapch is dirtied on load (UPackage::SetDirtyFlag) which triggers a resave operation. I traced it back to the following callstack: UnrealEditor-CoreUObject.dll!UPac ...

Deleting BP instances that have dynamic delegate bindings with other actors can cause those other actors to have stale actor desc references

The message can be resolved by resaving the actor desc. ...

Expensive WaitForTask in SceneCapture2D

UDN users have reported that expensive scene captures stall the render thread due to RDG flushing the RHI thread for resource deletion. This only needs to happen once per frame. ...

Ledge Movement Stuck (CheckLedgeDirection is always returning true)

The issue appears to that CheckLedgeDirection almost always returns true, which returns the leftward side step. This is correct for the leftward direction, but is not valid for the rightward directi ...