Unreal Engine Issues
Unreal Engine Issues
FLevelInstanceActorGuid::GetGuid issue in Multiplayer
UE - World Creation - Worldbuilding Tools - Level Instances - Feb 3, 2025I am doing some runtime manipulation of data layers and I am running into a check failure due to a zero guid in FLevelInstanceActorGuid::GetGuid during multiplayer testing. When I debug FLevelInsta ...
Spline mesh crashing in FRayTracingDynamicGeometryCollection::AddDynamicMeshBatchForGeometryUpdate
UE - Graphics Features - Ray Tracing - Jan 31, 2025A crash occurs when using ray tracing with spline meshes preceded by the following ensure : Ensure condition failed: NumCPUVertices <= VertexBufferNumElements File: Engine\Source\Runtime\Renderer\ ...
Foot Placement: Division by 0
UE - Anim - Gameplay - Jan 31, 2025static FVector PointDirectionPlaneIntersection(const FVector Point, const FVector Direction, const FPlane Plane) { return Point + Direction * ((Plane.W - (Point | Plane)) / (Direction | Plane)) ...
Lumen ignores Landscape Holes (Landscape Visibility) when Hardware Ray Tracing is enabled and Ray Lighting Mode is set to Surface Cache
UE - Graphics Features - Ray Tracing - Jan 31, 2025Context Lumen is the default global illumination and reflections system. Lumen renders diffuse interreflection with infinite bounces and indirect specular reflections in large, detailed environments ...
Foot Placement: Up vector is not configurable
UE - Anim - Gameplay - Jan 31, 2025Up vector is not configurable so Foot Placement does support variable gravity cases. ...
Check hit when setting push-model array from a different actor's blueprint
UE - Networking - Jan 31, 2025This is due to the same reason behind [Link Removed], as the stack object is passed to MARK_PROPERTY_DIRTY rather than the array property's owner. ...
Capsule component renders incorrectly with non-uniform scale
UE - Simulation - Physics - Jan 30, 2025Capsule component renders incorrectly with non-uniform scale because the render uses the minimum between the X and Y values and the collision code uses the maximum between the two. This issue is men ...
No warnings or errors if a UEnum has Bitflags metadata, but no Flags flag.
UE - Gameplay - Blueprint Compiler - Jan 29, 2025The problem here isn't obvious: the native enum, EAnotherEnum, is missing the Flags flag for the UEnum. As a result, K2Node_GetEnumeratorNameAsString returns the max enum when it gets a combined fla ...
Bitmask ints can't be converted to strings
UE - Gameplay - Blueprint Compiler - Jan 29, 2025While we do have an auto cast function that handles an int to string conversion, bitmask ints use a "bitmask" subcategory which thwarts are ability to find the cast function. ...
K2Node_GetEnumeratorName doesn't support bitmasks
UE - Gameplay - Blueprint Compiler - Jan 29, 2025This is almost identical to [Link Removed]. The difference is that we need a variant of UEnum::GetNameByValue that supports bitmasks. We'll likely have to run this by Core. ...