Crash when null texture parameter is present on a MIC

UE - Rendering Architecture - Materials - Apr 22, 2022

From UDN: [Link Removed] Proposed fix: int32 FHLSLMaterialTranslator::TextureParameter(FName ParameterName, UTexture* InDefaultValue, int32& TextureReferenceIndex, EMaterialSamplerType SamplerType ...

All public inline methods of class "FBlueprintEditor" are inaccessible to other modules due to "DLLIMPORT"

UE - Framework - Blueprint Editor - Jun 28, 2024

Class "FBlueprintEditor" has several inline getter methods as part of its public API (e.g. GetPreviewActor() and GetPreviewScene()). However, even though they are public, those methods are inaccessi ...

A Client connected to a Server that then destroys the session and rejoins will be disconnected after a short time

UE - Networking - Dec 8, 2015

A Client connected to a Server that then destroys the session and rejoins will be disconnected after a short time. Unable to reproduce in a new project, however this has been reported multiple times ...

Landscape Tessellation shadow depth performance cost higher than expected

UE - LD & Modeling - Terrain - Landscape - Aug 23, 2016

Using tessellation on Landscapes causes a greater impact in performance than what is expected. In the screenshots provided there is a comparison between tessellation disabled and flat tessellation ...

Landscape DFAO shadowing artifacts in Standalone and packaged

UE - Graphics Features - Oct 25, 2016

The Heightfield from DFAO when playing in Standalone or a packaged game has darkened shadow artifacts for the level. Workaround: Use r.AOGlobalDistanceField 0 to disable the Global Distance Field. ...

Character velocity is registered while walking against physics objects and vehicles

UE - Gameplay - Jan 28, 2016

Character velocity is registered while walking against physics objects and vehicles User description: I'm trying to rely on velocity to know when an actor is moving so that i can stop the walking ...

Warnings appear when playing a Sequence while in PIE

UE - Anim - Sequencer - Apr 24, 2017

While executing [Link Removed] Sequencer - Recording - Basics - Template – attempting to view a recorded sequence while in PIE triggers a set of warnings each time the play button was pressed. LogUO ...

[CrashReport] UE4Editor_Foliage!FMulticastDelegateBase<FWeakObjectPtr>::AddInternal() [multicastdelegatebase.h:113]

UE - World Creation - Worldbuilding Tools - Foliage - Jul 6, 2017

This is a common crash in the 4.16 release. The callstack is similar to [Link Removed], but that was fixed in 4.16.2 while this crash still occurs. Users have not provided any additional informati ...

Characters using NavWalking on server have noticeable jitter on clients at lower framerates

UE - AI - Aug 23, 2018

AI nav walking doesn't allow clients to set a "Base" for the character (SetBase from UpdateFloorFromAdjustment), so there is no floor result on frames where there is a net update. This causes simula ...

Unable to Import Alembic Files in UE4

UE - Editor - Content Pipeline - Import and Export - Feb 25, 2020

We have written a plugin for UE4 that allows Unreal users to import and set up Megascans assets into Unreal Engine. Recently we added Alembic files to our assets and also updated all our plugins to ...