Thumbnail of material is not previewed if FSoftObjectPath is used.

UE - Editor - Content Pipeline - Import and Export - Jun 11, 2018

https://udn.unrealengine.com/questions/437463/%E3%83%9E%E3%83%86%E3%83%AA%E3%82%A2%E3%83%AB%E3%81%AE%E3%82%B5%E3%83%A0%E3%83%8D%E3%82%A4%E3%83%AB%E3%81%8B%E8%A1%A8%E7%A4%BA.html ...

Disappearing components in Level Sequencer Spawnable Camera

UE - Anim - Sequencer - Mar 11, 2019

I believe this is similar problem to this UDN reported bug. https://udn.unrealengine.com/questions/438893/view.html It can be avoided by removing the comments in LevelSeuqnceActorSpawner.cpp UEng ...

Setting the Collision Response of an instanced actor through the Details panel overrides the Construction Script setting

UE - Simulation - Physics - Jun 23, 2020

The collision response of an actor can be changed through the Details panel of the instanced actor and this overrides the collision response settings that were set through the Construction Script. ...

Niagara Sim Cache result from 3D Gas is blocky in Windows packaged game

UE - Niagara - Sep 13, 2024

Summary: Cached 3DGas Niagara system appears blocky in packaged game. Brought up by a licensee via UDN: https://udn.unrealengine.com/s/question/0D5QP00000a17A40AI/niagara-fluids-simcache-artefacts- ...

In UE5.5(final), when adding plugin from an older version of Unreal to a BP project, we are informed that the Engine Modules are out of date, and cannot be compiled while the engine is running. Please build through your IDE.

UE - Foundation - Cpp Tools - Nov 19, 2024

In UE5.5(final), when adding plugin from an older version of Unreal to a BP project, we are informed that the "Engine Modules are out of date, and cannot be compiled while the engine is running. Ple ...

Macros from temporary diff blueprints can be placed and corrupt blueprint

UE - Gameplay - Blueprint - Feb 1, 2021

Following the repro, a temporary copy of a BP Macro library is loaded into memory. When you right click to place a node, it incorrectly lists macros defined in this temporary library. They are fully ...

Latent Actions do not execute if the blueprint name contains non-english characters

UE - Foundation - Core - Oct 27, 2020

REGRESSION: Issue started occurring with 4.25.4 Blueprints with non-English characters in their name will not trigger latent actions. The following warning appears in the log in this case: LogScr ...

Rect light LTC textures fail to load when cooking with bSharedLinearTextureEncoding enabled

UE - Texture - Apr 2, 2025

When running a build with bSharedLinearTextureEncoding enabled, View.GGXLTCMatTexture and View.GGXLTCAmpTexture are pointing at the black texture fallback, which affects correctness of rect lighting ...

Crash: Unhandled exception UE4Editor_Renderer!FMobileBasePassMeshProcessor::Process

UE - Graphics Features - Mar 14, 2019

HUD can cause a crash when used with Mobile. "When running from visual studio exception happens here: https://github.com/EpicGames/UnrealEngine/blob/4.22/Engine/Source/Runtime/Renderer/Private/Mobi ...

The "Random Integer in Range from Stream" returns the same value if the seed is power of 2 of anything above 22.

UE - Foundation - Core - Aug 7, 2019

When using the "Random Integer in Range from Stream" where the seed is a power of 2 after a certain point (2^22) the random integer that is returned is the always the same. If the seed is 2^23 + 1 i ...