Unreal Engine Issues

Motion blur on player/weapons with TAA

Looks like this can occur with motion blur off aswell, so likely it's a TAA motion vector issue. Similar issue occurs in UE5 (see [Link Removed]) ...

Objects in AR not synced well with camera movement on iOS

Ornatrix Alembic files display unnatural movement in Groom after import

Video of the issue here - [Link Removed] ...

Uninitialized Critical Section exception error in Niagara/VectorVM when gflags application verifier enabled causing potential Memory Corruption

The following is posted from the user who submitted this issue: We noticed a crash happening in a certain area of our game, and the debugger showed it appeared to be attempting to free an invalid m ...

bUseAsOccluder not taking effect with dbuffer decals are disabled

See the licensee discussion for details discussed with [Link Removed] ...

RHILockTexture crash with ray tracing enabled

Looks like it's a resource state tracking assert issue on the resource. ...

Material Instance changes are not propagating to layers.

Please note, during this repro, when I attempted to change the colour of the layer_inst using the colour wheel, it would not save the updated colour. This may be a separate bug. ...

EyeAdaptation node is not working in Decal

It is working correctly in 4.25.4. In 4.26.2, it is not working. It is also not working in UE4main 16382403. ...

Editor freezes up when dragging the scroll bar of the Visual Logger window when a bvlog file isn't loaded

When adjusting the scroll bar in the Visual Logger window, the editor freezes up. There is no callstack provided in the logs. The only way to close the editor at that point is to close it through th ...

Crash when setting Kill Particles to true on some emitters in a Niagara System

When setting the Kill Particles boolean of an emitter in a Niagara System to true, the editor crashes. So far, I've only been able to reproduce the issue with the NS_EH_KP system that a user provide ...