UCharacterMovementComponent OldVelocity is pre-additive while Velocity is post-additive

UE - Gameplay - Player Movement - Oct 10, 2019

In UCharacterMovementComponent code such as PhysFalling, RestorePreAdditiveRootMotionVelocity is called before FVector OldVelocity = Velocity; leaving OldVelocity in a pre-additive state making furt ...

HLSLCC crashed on parsing UAV related instruction

UE - Graphics Features - Oct 10, 2019

1.glsl_type with image was not fully inited with HlslName field set, causing the crash 2.seems many types of op are not support by current hlslcc, cause error msg. e.g. RWTexture2D.Load[Image Remo ...

Screen tearing with ARKit enabled applications

UE - Platform - XR - Oct 9, 2019

Screen tearing occurs when navigating the device around the AR space. ...

Unable to delete levels with Particles in them

UE - Gameplay - Oct 9, 2019

The engine is unable to Level that has a Blueprint actor with a child actor component that has a particle system component. The follow message pops up: World /Game/LevelName.LevelName is in use. — ...

Duplicating a static mesh with foliage attached breaks connection

UE - World Creation - Worldbuilding Tools - Foliage - Oct 9, 2019

GetClassDefaults node retains 'hidden' references to original default.

UE - Gameplay - Blueprint - Oct 9, 2019

Need to add calls to Super::PinConnectionListChanged() and Super::PinDefaultValueChanged() in K2Node_GetClassDefaults.cpp. ...

"Warning: GEditor isn't valid! Particle reset commands will not work for Niagara components!" when QA-PostProcessing is opened with -game

UE - Niagara - Oct 8, 2019

The following warning will be present when running QAGame QA-PostProcessing with -game:LogNiagaraEditor: Warning: GEditor isn't valid! Particle reset commands will not work for Niagara components! ...

Edited properties of replicated components created via the "AddComponent" BP node aren't correct on clients

UE - Networking - Oct 8, 2019

When properties are customized on an Add Component node, and the component is replicated, the client will create the component without the customized properties. This is likely due to subobject repl ...

Mesh Paint can fail to find vertices using physics collision query

Tools - Oct 8, 2019

Mesh paint is for painting the vertices of a mesh, but in part uses physics collision queries to detect hits and search for vertices. (see FMeshPaintGeometryAdapterForSkeletalMeshes::LineTraceCompon ...