Unreal Engine Issues
Unreal Engine Issues
Changes to Instanced Properties default value on BP not propagated to placed actors in the opened level
UE - Foundation - May 15, 2025In UE versions 5.4 and onwards (as of CL 42589677 in Main), when an Instanced UObject property is defined in an Actor Blueprint, modifying the default value in the Blueprint does not propagate the c ...
RayTracingManager::Tick() called twice in a single game frame
UE - Graphics Features - Ray Tracing - May 14, 2025A licensee has shared a project with us, in which they are able to trigger a problematic case where the RayTracingGeometryManager is ticked twice during a single game frame. It would be good to inve ...
WidgetComponent is not updated with occlusion culling disabled
UE - Platform - XR - May 7, 2025LastRenderTime is never updated with occlusion culling disabled, so the widget component will always stop updating. (see UWidgetComponent::ShouldDrawWidget) Developers can force updates by TickWhen ...
ConditionalBeginDestroy on ActorComponent does not unregister the component with the world nor cause a warning
UE - Framework - Components - May 6, 2025Calling ConditionalBeginDestroy on an ActorComponent (instead of DestroyComponent) can lead to a crash due to the object not being correctly unregistered. BeginDestroy doesn't unregister tick funct ...
Animating a bone in Persona when additive curves are present, causes exponential translation
UE - Anim - Runtime - May 5, 2025If there is an additive curve present with scalar data, and that scalar data is something like 10,10,10. When you attempt to animate the bone again the translation of the widget with translate expon ...
ChaosWheeledVehicleMovementComponent is breaking the const CDO contract and changes to the instances are being applied to the CDO
UE - Simulation - Gameplay - Apr 28, 2025As described by the licensee, the const CDO contract is being broken on ChaosWheeledVehicleMovementComponent. The issue the licensee is facing is that by spawning cars with different configurations, ...
Fields with Maximum resolution are not affecting all leaves of a Geometry Collection
UE - Simulation - Visual - Apr 25, 2025Fields with Maximum resolution are not affecting all leaves of a Geometry Collection on 5.4 and onwards. When calling GetRelevantParticleHandles() a Maximum Resolution field does return all particl ...
Unable to change file path
UE - Editor - Content Pipeline - Visual Dataprep - Apr 23, 2025Hello, I'm using Dataprep to import an FBX file, and running into some difficulties of arranging my data. I have the following on import: [Link Removed] I'll discuss textures here, but in realit ...
Chaos Trailing Events not exposed to Blueprints and only accessible via Niagara Chaos DI
UE - Simulation - Visual - Apr 22, 2025Chaos Trailing Events not exposed to Blueprints and only accessible via Niagara Chaos DI. The licensee noticed that the Trailing event is not available to BPs. It's expected that the same data avail ...
Sampling regions don't get created when creating a mesh.
UE - Anim - Mutable - Apr 17, 2025I'm trying to use VFX in specific regions on a character and would normally use sampling regions to do it easily, however the mutable mesh that is generated doesn't seem to be creating any of the on ...