Unreal Engine Issues
Unreal Engine Issues
PlayMontages can break after binding an actor with an AnimInstance inside a LevelSeuqence.
UE - Anim - Sequencer - May 28, 2025When an Animation Sequence is overridden by a LevelSequence, and later reverts to its original animation state, the AnimInstance fails to properly reinitialize. This prevents subsequent animation lo ...
VSM SMRT SamplesPerRay CVars behave differently if groom assets are present leading to a potential full-scene shadow
UE - Graphics Features - May 28, 2025When a groom is present, setting any SamplesPerRay SMRT CVar to zero results in an unexpected complete shadow projected from the light. ProjectLight() in VirtualShadowMapProjection.usf has addition ...
Unexpected Collision Response When Nesting Primitive Components with auto-weld enabled and physics disabled on children. The root primitive falls through floor even though it is set to block all.
UE - Simulation - Physics - May 27, 2025Context Auto-weld makes it so if a child is attached to a parent, the two bodies will be joined into a single rigid body. Physic settings like collision profile and body settings are determined by t ...
UAnimSingleNodeInstance doesn't sample notifies on montage animation tracks
UE - Anim - Gameplay - May 27, 2025Notifies that are placed on animations referenced by montages aren't triggered when using the UAnimSingleNodeInstance to play back the montage. This is because - unlike on UAnimComposite - there is ...
Rendering of a Text Widget with Outline does not track LayerId correctly
UE - Editor - UI Systems - May 27, 2025Text widget with Outline uses 2 LayerId levels to draw the outline and the text glyphs. This can be seen in function FSlateElementBatcher::AddShapedTextElement(), where lambda BuildFontGeometry() is ...
Virtual Shadow Maps on Spot Lights cause a blocky presentation similar to an incorrect mip level
UE - Graphics Features - Shadows - May 26, 2025Spot Lights may present with very blocky shadow artefacts when a long attentuation radius is provided with a small cone angle. In extreme cases, this causes the VSMs to invalidate every frame. Notab ...
World Source in Take Recorder does not record auto-tracked actors properly
UE - Virtual Production - Tools - Take Recorder - May 23, 2025The Take Recorder plugin allows for multiple sources to be recorded during gameplay. The World Source is expected to record everything in the level when the Autotrack Actors option is enabled. Once ...
Creating FTickableObjectBase inherited class in async thread may cause pure virtual function call
UE - Framework - May 22, 2025Classes that inherit from FTickableObjectBase are added to the tickable queue by the QueueTickableObjectForAdd function during their construction (see FTickableGameObject::FTickableGameObject). At t ...
Misaligned sampling in UI Material with with CustomStencil
UE - Editor - UI Systems - May 19, 2025The output of the CustomStencil node in a User Interface material does not align with the viewport dimensions. Toggling fullscreen/windowed mode (F11) causes the offset to reappear, so scaling the n ...
AnimNotify Issue with LevelSequencer Actor with URO
UE - Anim - Runtime - Anim Blueprints - May 19, 2025Sometimes AnimNotify does not fire when an animation is executed under the following conditions. 1. The CharacterMesh's AnimationMode uses UseAnimationAsset 2. CharacterMesh's URO is enabled (Enable ...