Unreal Engine Issues

Simulate motion vectors can fail on camera cuts

r.MotionVectorSimulation 1 should simulate motion vectors when cutting cameras, but this appears to be broken on some loops. ...

Jump Animation for FPS template character breaks on land

When jumping in the first person template project, the "is in air" animation continues to play after landing. Solution: Switching out the "FirstPerson_JumpStart Asset" node for the "FirstPerson_J ...

Rect Light Texture does not unload during level streaming in packaged game

Local Exposure can cause large variations in PreExposure under certain conditions

PreExposure is influenced by LocalExposure in PostProcessEyeAdaptation.cpp:1265. It appears when the scene is particularly dark and using manual exposure, the LastAverageLocalExposure can read a lar ...

Re-enable rendering categories on UMaterialBillboardComponent

Looks like the thread died in IM. I think we should re-enable the categories that were removed in 4.6. ...

Enable Slate layout caching Will cause the Stop/Play Buttons to disappear

When using the command Slate.EnableLayoutCaching 1, The Play button is removed from the tool bar after exiting play. ...

Hair shading emits light when Lumen is enabled

This artifact does not occur when Lumen is disabled. Also, moving Roughness closer to 1 will reduce the effect. ...

All Megascan asset libraries are missing

All Megascans assets no longer appear in Twinmotion 2025.2 hotfix (46767548). Other libraries do not appear to be affected. ...

Project crashes when exiting mobile preview

User project crashes when exiting from mobile preview. Frequency: 5/5 Crashreporter: [Link Removed] ...

Sequencer: Undoing creation of a new section can call section drawing code with viewmodel tree in invalid state

The Section reference in ISequencerSection::GetSectionHeight can be in the process of garbage collection during an undo of a section addition- this causes things like GetTypedOuter<UMovieSceneTrack> ...