Depth of field rendering artifacts - flickering and masking

UE - Rendering Architecture - Jan 16, 2024

Flickering and large flashes can be seen on reflective objects that are out of focus with DOF enabled. DumpGPU shows that artifacts are visible in TSR . ...

SwapRootBone_Actor ignores a relative rotation

UE - Anim - Sequencer - Dec 19, 2023

When we use SwapRootBone_Actor, we expect to move in the X-axis direction, which is the forward direction of the Actor. However, it does not take into account the RelativeRotation of the Skeltalmesh ...

[Attenuation][Spatialization] - If speaker output is set to stereo, the Surround 2D Non Spatialized Radius Mode doesn't generate any audio

UE - Audio - Dec 12, 2023

If Surround 2D is set as the Non Spatialized Radius Mode, there is no fallback option if the user's output is not a surround format (eg stereo). There is also nothing communicated in the Tool Tip. ...

Character jumping can become permanently blocked under subpar net conditions

UE - Gameplay - Player Movement - Dec 8, 2023

Problem Under laggy networking conditions, if the user rapidly presses the jump button the character can at some point stop responding to jump input. Initial Thoughts It looks like there's a logi ...

Expensive WaitForTask in SceneCapture2D

UE - Rendering Architecture - Nov 20, 2023

UDN users have reported that expensive scene captures stall the render thread due to RDG flushing the RHI thread for resource deletion. This only needs to happen once per frame. ...

Single sided complex collision mesh collision blocks character movement from backside

UE - Simulation - Physics - Query - Nov 17, 2023

Commenting out the branch in FTriangleMeshSweepVisitor::VisitSweep is a work-around.if (CullsBackFaceSweepsCode != 0) { if (VectorMaskBits(IsBackFace)) { // Don't cull the back face ...

iOS launch screen might briefly appear in Portrait before switching to Landscape

UE - Platform - Apple - Nov 13, 2023

Sometimes on the first launch of the game after install, the launch image will be a cropped portrait drawn in landscape orientation, on the left side of the screen, with the top and bottom getting c ...

Curve Editor: Zoom/Pan in Normalized view constantly adjusting/changing

UE - Anim - Anim in Engine - Nov 6, 2023

Panning/Zooming in Normalized view is constantly shuffling your view around.. See Attached Video: [Link Removed] ...

Check inside FAssetSourceControlContextMenuState/FPerforceSourceControlProvider

UE - Editor - Workflow Systems - Oct 31, 2023

The async execution from within the context menu state is not cancelled properly when closing the context menu. This means that when rapidly opening and closing context menus there will be corruptio ...

Selecting an asset directly in a blueprint method parameter asset selector fails when the parameter type is an interface.

UE - Framework - Blueprint Compiler - Oct 20, 2023

Ensure message: Ensure condition failed: false [KismetCompilerVMBackend.cpp][Line: 1076] It is not possible to express this interface property as a literal value! (InterfaceProperty /Script/BugRepr ...