Unreal Engine Issues

Landscape cooked heightmap and Physical Material mismatch

Several users have reported crashes where the Heightfeild loaded from the DDC and physical material list do not match. Suggest adding the number of physical materials to part of the cooked heightma ...

Physics actor with physics toggled will fall through static meshes set to Movable

Physics actor with physics toggled will fall through static meshes set to Movable User Description: Basically, what this project does is enable simulate physics on the black cube in the middle, th ...

Particle disappears if it is using PSA_Velocity and setting custom time dilation 0

A licensee reported some of their particles disappear when setting the actor's custom time dilation 0. This seems to happen when a particle is using PSA_Velocity as Screen Alignment. This repros in ...

EQS Overlap test no longer recognizes custom Collision Object Channel

Environment Queries Ignore tests for Custom Collision Object Overlaps. Note: The expected behavior seems to have worked in 4.21, After following the steps to reproduce, I can verify a successful de ...

Delta struct serialized fast arrays replicating new elements with no changelist

There is a scenario where delta struct serialized fast arrays can replicate changes that introduce additional elements to the array, but without changelists containing the new data. This needs furt ...

Certain UPROPERTY values are not updated during auto-recompile

Sometimes manual recompile is required to make a blueprint actually recompile data-only changes, but not always. If the last manual compile was with default values, then changes are not updated. If ...

Modifiers do not behave as expected when adding conflicting mappings of different priorities

Breaking a level instance can not remove the level instance from world

Currently there is no stable way to break level instances ...

iPadOS AR App Crashes when ARKit's "Use Scene Depth for Occlusion" is Enabled

Does not crash in 5.4 on same hardware so looks like a regression. Attached Unreal logs indicate source of critical error: 'FARKitCameraOverlayMobilePS' shader uniform expression set mismatched sh ...

Multigates only fire the first output when inside a function

Multigates only fire the first output when inside a function. The same setup in the Event Graph will function as intended. Reproduced in 4.7.4 binary and Main (//depot/UE4/Promotable-CL-2498147) ...