Exposure Bias in Post Processing is blown out for Samsung Note 5

UE - Platform - Mobile - Apr 6, 2016

The post process within the project is causing the light to show up extremely bright on Note 5. This project has been tested on a Nexus 5, Samsung Galaxy S6, and Nexus 5X. Could not repro on: 6713 ...

ARKit GetCurrentFrame crashes app

UE - Platform - XR - Aug 22, 2018

Using "GetCurrentFrame" crashes app. "The crash is due to the default constructor of FAppleARKitFrame being called by the above mentioned blueprint function. That constructor fails to initialize fi ...

Removing BlueprintReadWrite from a UPROPERTY declaration doesn't make existing nodes invalid

UE - Gameplay - Blueprint Compiler - Sep 11, 2015

Blueprint nodes that exist as a result of the UPROPERTY() macro don't get disabled once the "BlueprintReadWrite" or "BlueprintReadOnly" is removed as a parameter in the UPROPERTY() macro. The nodes ...

There is a possible code mistake in UPrimitiveComponent::GetCollisionShape.

UE - Gameplay - Oct 21, 2015

A user pointed out a possible mistake in the Engine source code. In the GetCollisionShape function in the UPrimitiveComponent class, an FVector variable Extent is created and set, and then potential ...

Compile error when Blueprint Interface returns a map type variable

UE - Gameplay - Blueprint - Feb 26, 2019

A Blueprint Interface function that returns a map type variable will fail compiling with various errors when called in another Blueprint. If the same function is setup in the Actor Blueprint instead ...

Overridden Lightmap Resolution in Sample Projects are too high

Docs - Samples - May 11, 2015

Starting with 4.7 and when we changed the BSP blocks in Sample Content to Static Meshes, a significant minority of lower end PC users are getting soft crashes (freezes and rebooting required to cont ...

Foliage LODs do not appear to use the base LODs lightmap any longer

UE - World Creation - Worldbuilding Tools - Foliage - Dec 16, 2016

LODs used with the Foliage Tool are no longer being shadowed accordingly with their baked lighting from their base LOD. Originally they would stay consistently lit, where as now the lower LOD transi ...

AutoCreateRefTerm does not provide a way to specify that a TArray property within a struct should have a default value created for it if none is provided

UE - Gameplay - Feb 9, 2018

The current implementation of AutoCreateRefTerm does not allow for a default value to be automatically created for a TArray contained within a struct that is passed into a function as a parameter. I ...

[CrashReport] UE4Editor_Engine!FTextureCacheDerivedDataWorker::BuildTexture() [texturederiveddata.cpp:772]

UE - Graphics Features - Feb 20, 2017

Error message: Access violation - code c0000005 (first/second chance not available) Source Context:757 if (SourceMips.Num()) 758 { 759 FFormatNamedArguments Args; ...

AbilitySystemComponent::NotifyAbilityEnded Can Crash due to Callbacks Invalidation Specs

UE - Gameplay - Gameplay Ability System - Oct 11, 2023

Pasting from the UDN: Unsafe code in AbilitySystem can lead to crash when granting an ability inside OnAbilityEnded Hello. We just ran into a crash. After investigation, it seems to be caused by ...