The AABBTree spatial acceleration structure goes off-sync when physics substepping is enabled in a "low" framerate environment.

UE - Simulation - Physics - Mar 15, 2024

When you enable the physics substepping, if you run the console command p.Chaos.Solver.DebugDrawSpatialAccelerationStructure 1, you can see how does not follow the physical object. The user that rep ...

Crash when double clicking on RowStruct's CurveEditor

UE - Editor - Applied Usability - Mar 15, 2024

This problem can be reproduced with UE5.3 even after applying fix [Link Removed]. We have verified this issue with UE5.1 and it is not reproduced.  ...

Sparse volume textures displayed in Heterogeneous volume only visible in left eye

UE - Niagara - Rendering - Mar 14, 2024

Sparse volume textures displayed in Heterogeneous volumes are only visible in the left eye, as well as Niagara Fluid Sims. UDN for reference: [Link Removed] ...

Performing seamless server travel while a Legacy Camera Shake with an Anim Sequence set is ongoing will cause a crash

UE - Anim - Sequencer - Mar 14, 2024

When we server travel with seamless travel enabled, and a legacy camera shake with an anim sequence set is currently ongoing, we will get a crash due to the UMovieSceneEntitySystemLinker failing a c ...

VSMs not rendering soft shadows on left eye in stereo rendering when more than one light is casting shadows

UE - Graphics Features - Mar 13, 2024

Left eye shadow dithering stops working at a certain distance away from the light. To recreate this behavior with any project, follow those steps: Create an empty levelAdd a static mesh and a backd ...

InstancedStruct hard references fail to cook in World Partition map

UE - World Creation - Worldbuilding Tools - World Partition - Mar 12, 2024

Hard references through InstancedStruct do not cluster the actors together into the same cell. ...

When copying category properties, all the EditConst flags are not checked. This overrides variables that should not be written.

UE - Editor - Workflow Systems - Mar 12, 2024

If you create two actors that have the same structure of variables in a category, and you try to copy the category variables of one actor into the other, variables that have ReadOnly/EditConst speci ...

Playing two instances of the same level sequence with an audio track will not work as expected.

UE - Anim - Sequencer - Mar 11, 2024

Two instances of the same level sequence playing audio will cause the audio to stop playing. ...

CharacterMovementComponent: simulated proxy can go into falling due to linear velocity quantization when using custom gravity

UE - Gameplay - Components - Mar 8, 2024

The character movement component in  void UCharacterMovementComponent::SimulateMovement(float DeltaSeconds) evaluates whether to find the floor when simulating the movement of the simulated proxy ...

Materials with transparency still visible in alpha with holdout in Render layers.

TM - Tools - Mar 8, 2024

The Transparent materials like the Glass don't behave correctly in Raster (in PT is working as expected).  They are visible in Alpha with Holdout.  This is an Engine limitation for now. But we sho ...