Unreal Engine Issues

RayTracingManager::Tick() called twice in a single game frame

A 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 ...

ResavePackages commandlet (buildlighting) fails/asserts on reflection captures in non-visible sub-levels

When building reflection captures through the ResavePackages commandlet, it frequently triggers an ensure inside of ReflectionEnvironmentCapture.cpp. If distributed shader builds start causing prob ...

PIE Seamless Travel with a standalone level instance causes assert in UWorldPartition::BeginDestroy

This check is hit on the server instance while it is performing garbage collection during the seamless travel. During this garbage collection, it will determine that the UWorldPartition object belon ...

Mover character flickers downward while crouched and moving every so often

Repro Rate 5/5 Packaged onWindows - 10 - Enterprise - L3864 Processor: AMD Ryzen Threadripper PRO 3975WX 32-Cores 3.50 GHz RAM: 128 GB GPU: NVIDIA GeForce RTX 3080 GPU Driver Version: 572.83 ...

When very far out from the map origin, large static mesh is not streaming in until player is close in world partition even though it's within loading range.

Context World Partition has a distance-based level streaming system that provides a complete solution for large world management. Problem The problem is that when the player and large static mesh a ...

InstancedStruct Local Variables do not work

The licensee has noticed that local variables of type InstancedStruct return nullptr. The setup is a verification of the behavior. Class variables work normally. I've tested this behavior on every v ...

Animating a bone in Persona when additive curves are present, causes exponential translation

If 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

As 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, ...

Compile error when including OnlinePurchaseInterfaceSteam.h

Mover MoveDirectionIntent can be 0 due to interpolation

If two states have MoveDirectionIntent vectors that are opposite to each other, interpolating between these states can result in MoveDirectionIntent being 0. This may cause issues for animation blue ...