Unreal Engine Issues

Jitter on anim sequences compressed with ACL containing large scale on root

The ACL codecs are generating jitter in the animations on the linked UDN.  This may be related to the large scale that's being applied to the root bone in the skeleton.  This appears to be a regress ...

Base materials in exported Datasmith files imported into Unreal Engine are missing material function.

Datasmith imports in UE do not render materials due to missing material function. Works in UE 5.6 main but not UE 5.5 or 5.4 ...

Get VR Focus State will cause a crash if used without a HMD device on

Get VR Focus State will cause a crash if used without a HMD device on ...

Using the output from FindAllPakFiles to call StreamableManager::RequestAsyncLoad causes a crash

A user has reported a problem where the directory that is output from FindAllPakFiles is not compatible with the StreamableManager::RequestAsyncLoad function and will cause a crash if using the two ...

Custom animation node in game module fails to load in -game or packaged project

Not sure if this is an Animation or a Core issue, but a runtime Anim Node will not load properly with "-game" or in a packaged build. The developer that made this sample read this blog post: [Link ...

[Crash]-[Reimport] - Crash on reimporting CAD file with deleted light sources

Crash when quitting the editor with VR Mode enabled

Qutting the engine with VR Editor on causes a crash. I could not determine a way to close the VR Editor internally so I terminated the Project by using the Desktop. Many users among the community ...

Niagara Editor Viewport will crash when rendering opaque materials with Mobile Multi-View and Mobile Vulkan Preview Enabled

The Niagara viewport will crash when rendering opaque sprites if Mobile Multi View and the mobile preview are enabled. Additive materials do no crash, and if the viewport is not set to lit it does ...

Foliage Culling is Broken on Linux

When viewing foliage on Linux it culls in and out as the camera comes closer to it. Also changing the way it is rendered to become grey and transparent (and changing back to normal, perhaps dependin ...

Crash when removing Blueprint function

The Editor crashes whenever the reference to the "DeleteThisFunction" function is deleted. ...