Moving a Copy of an Actor from Persistent to Sublevel Dirties Persistent Level

Tools - Aug 18, 2017

Using Alt-Drag to move a copy of an actor from the persistent level to a sublevel (when the sublevel is selected as the current level in the Levels window), the persistent level is getting marked as ...

Adding NotifyTrack from AnimDataModifier doesn't refresh Animation Editor

UE - Anim - Runtime - Aug 12, 2020

When creating a Notify Track using an Animation Modifier in the Animation tab of an Animation Sequence, the new Track added and applied fails to appear in the Notifies panel until the panel has been ...

Anim Dynamic state does not reset when closing sequencer

UE - Anim - Sequencer - Apr 1, 2019

When using Anim dynamics in an animation. The actors affect stop in their current state once the sequence controlling the anim dynamics is closed. They do not appear to reset to their default state ...

Ribbons Don't Follow Their Source Particles When Scaling

UE - Niagara - Mar 23, 2020

When Ribbon Data in a particles system that is following is scaled in an instance the ribbons scale appropriately, but they don't follow updated location of their source particles. See the attached ...

Packaged Paper2D game using Flipbooks crashes when opening Level

UE - Gameplay - Components - Sep 11, 2020

Paper2D game using Blueprint Actor with Box Collision and Flipbook Component crashes frequently when loading levels in packaged Development Build. Reported and tested in versions 4.25.3(CL 139427 ...

Line trace fails to detect Destructible Mesh

UE - Simulation - Physics - Destruction - Jun 15, 2015

When using a line trace in the construction script so that objects can return a value destructible meshes will not return a hit. This does not affect use in game with PIE or Standalone game, but if ...

Runtime Virtual Texture samples at low precision for very large volumes

UE - Graphics Features - May 31, 2022

When using a runtime virtual texture with a resolution of greater than 2^24 we can start to see a lack of precision in sampling when the sampling UVs get closer to 1. To see this we need to be usin ...

Changing transform of simulated component during physics freezes motion

UE - Simulation - Physics - Oct 13, 2016

If something is executed before a SetActorRotation node on Tick inside of a SceneComponent class BP and then added to an Actor class BP, the physics will lag User Description: When using set rotat ...

Crash when Rendering a Sequence at resolutions higher than 4K with DX12 and Ray Tracing Enabled

UE - Rendering Architecture - RHI - Jul 2, 2019

The Editor will crash when rendering a sequence at 7680x7680 with dx12 and ray tracing enabled. Found in 4.22 CL# 7053642, 4.23 CL# 7208101, 4.24 CL# 7210422 ...

Cannot resize comment box when new comment is created on top

UE - Rendering Architecture - Materials - Apr 27, 2017

Cannot resize comment box when a new comment is created on top. The resizing affects the bottom right corner. This issue is dependent on how the comment is added if comment 1 is highlighted and a ne ...