SceneCapture2D Components when referenced on screen by UI widget will cause massive screen flickering in Standalone, Launched or Packaged Game

UE - Graphics Features - Feb 10, 2016

When a SceneCapture2D actor is added as a Component to a Blueprint actor and the Render Target is assigned to a UI component in the level, the screen flickers at a rapid pace. The effect is slightl ...

Save on Compile "On Success Only" Does not save on Successful Compiles with Warnings

UE - Gameplay - Blueprint - Aug 6, 2015

The option to save on Compile "On Success Only" does not save on successful compiles that contain warnings. If this is intended, then to avoid confusion, the tool tip should specifiy that "Blueprin ...

Cannot watch values inside of a function in blueprints

UE - Gameplay - Blueprint - Sep 8, 2015

Values are never considered in scope when a variable is watched within a custom function, even though "watch this value" is available for use. ...

Physics not reacting correctly with physical material if velocity is not high enough

UE - Simulation - Physics - Feb 3, 2015

There are issues with the way Physics is being handled with physical materials. Having a physical material setup with a restitution of 1 and a high max depenetration value will result in no bounce. ...

Setting LOD Group for Foliage wipes previous LOD data

Tools - Feb 4, 2015

If you import a mesh with LODs and assign the LOD Group for Foliage the mesh will import with all appropriate LODs. If you do not select a LOD group and after decide you want to change the LOD Grou ...

Crash can occur in the Ansel plugin when setting Use Client Side Camera Updates to false in Player Camera Manager

UE - Graphics Features - Apr 18, 2017

Setting the `bUseClientSideCameraUpdates` property in a `PlayerCameraManager` class to false can result in a crash in the Ansel plugin because `GEngine->GameViewport` may be NULL. Another user has ...

[CrashReport] UE4Editor_UnrealEd!TArray<TScriptDelegate<FWeakObjectPtr>,FDefaultAllocator>::Find() [array.h:784]

UE - Gameplay - Aug 22, 2017

This is a regular crash occurring in 4.17. It may be a regression as there is no immediate evidence of it occurring in prior releases. Users have not provided any descriptions of their actions whe ...

r.AllowOcclussionQueries causing "huge RenderQuery Result" wait time in VR

UE - Graphics Features - Dec 3, 2019

Running r.AllowOcclusionQueries 0 command seems to set bWait = true, causing large wait times Tested: 4.22.3 CL#7053642 ,   4.24P4 CL#10387632 , 4.25 CL#10479005 Link to the users video, which ...

No shadow cast after Static Mesh Editor material assignment

UE - Editor - Content Pipeline - Datasmith - Importer - Apr 21, 2020

This is a Rhino file. Shadows are not cast on the Static Mesh after materials are assigned in the Static Mesh Editor. This was reported and tested in 4.24.3 (CL-11590370). This was reproduced in 4. ...

Anim sequence in DLC leads to crash in IOS.

UE - Platform - Mobile - May 19, 2020

DLC download is working as expected but opening a map with anim sequence which is located at DLC's pak file will lead to crash in iOS. ...