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

Underscores do not appear in Category names

Underscores do not appear in Category names within blueprints. Regression (no) issue (does) occur in 4.12.5 ...

Performance regression from 4.10 to 4.11 on Sony Xperia M4 Aqua

User reports that on the Sony Xperia M4 the FPS have decreased from about 25 down to 5 after upgrading to 4.11. ...

SSR not rendering correctly in SM4 Preview

This is a regression from 4.17.2 and you do not need to be in PIE to see the effect. This is not seen in Shader Model 5 ...

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. ...

Lightmap density view mode displaying zfighting when moving around in the viewport

assets within the FPS template are showing zfighting when in Lightmap density mode not reproduceable in 5.0  ...

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. ...